Dear Art and All
I support your efforts in this regards and it would be good to have a webinar
on the subject.
I remind all as does Richard S that one of the obvious uses of char and char
fines (which I consider to be separate resources) is as fuel in another stove
or other combustor. The
Dear Friends of Formula 1 and electricity from hot stove exhausts
http://www.mercedesf1.com/en/car/pu106a-hybrid/
See the last slide at the bottom.
That is a seriously powerful electrical generator running on the heat of the
exhaust called an MGU-H. It can deliver approximately 2 MJ
Dear Samantha
Do the people you are working with require space heating part of the year?
Thanks
Crispin
Hi Paul,
What an encouraging email, thanks for getting back to me. We are based out
of the town of Batan Grande, which is around 80m, but we work with
communities throughout the
Dear Adrian
What were you lighting the charcoal stove with?
Thanks
Crispin
Hi List,
Just a few notes; our webpage is www.rocketworks.org
http://www.rocketworks.org
Thanks Erin for your corrections.
Just some more news, we've developed a new stove the 'Zama Zama'
It is in
with dung in
desperation.
Regards
Crispin
Do these stoves produce any biochar?
On Feb 3, 2014, at 1:36 PM, Crispin Pemberton-Pigott wrote:
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Dear Erin
It does look like a Rocket but it is called (I am pretty sure) Roketworx).
It has a side feeding layout but so do lots of stoves. Inside it is nothing
like a Rocket stove and does not follow the same design principles, even for
a metal Rocket.
I received word this morning that it
Dear Friends
Sorry about that, I was wrong about which NGO this is. This is in the
Eastern Cape Province of South Africa. The rest of the message still
applies. Edits in blue.
The strong little stove that you may have seen in Phnom Penh has popped up
in Bulungula, an orphanage in the
Dear Ron
.my interest is on biomass stoves and the ability to feed multiple pots
from a single flame.
Do you have an application in mind? A place and perhaps pot sizes?
Many of the Indonesian stoves are multi-pot with a commercial activity on
the first hole and cooking, water warming
Dear Ron
1. The paper I cited
(http://cfc.kscia.or.kr/new/wwwboard/admin/wwwboard/attach/1087363006/26.pdf
) was
Understood.
2. At: http://www.thermomax.com/Downloads/How%20Works.pdf,
Understood.
3. I am trying to move the discussion away from solar collectors - for
Teddy are you going to be 'around' Nairobi from Feb 10-15?
I can help you out with drawings and discussion. There are a few topics we
might discuss re jikos and all.
Vincent, are you going to be around as well?
Regards
Crispin
That is a fantastic shear - Iv been looking for
Dear Ron
Good find.
This is basically identical to a system built by Mercedes in Germany that
was shopped to South Africa for testing. It cost an absolute fortune so
there was no plan to make a commercial version at that stage. I understand
it had been fabricated by the apprentices working
Dear Vincent
The question was prompted by the overall need to stop the heat in the
firebox from reaching the foundation (made of clay) and burning it up.
Something you can try is the system used in the StOvs Cooker from Senegal.
When you visited (in the past) the bioenergylists.org website
Dear Friends
The project described at
http://blogs.lse.ac.uk/africaatlse/2014/01/22/carbon-finance-plays-its-part-
in-empowering-women-and-saving-lives/
discusses the LPG project in Darfur that has received Carbon Financing. Two
things stand out in this, the first being the cost of getting
Dear Darius and Kevin and All (but not Andrew in the UK!)
This is an ideal application for low grade solar. A Canadian farmer John
Currelley, now in Haiti for many years, built a south-facing solar collector
on the metal storage silo (not a particularly big one) in which he kept his
maize
Dear Ron
My compliments for breaking things into relevant sections. Very
understandable. It would be nice to have a new discussion session here per
week with a new topic each Monday. There is much to report from around the
world one each of these items, both major and minor.
Thanks
Dear Nolbert
Please try to emphasize that there is a lot to be learned from the Chad and
Rwanda models of charcoal production and trading, and that the illegality of
the trade makes nearly no difference at all in the volume traded, it just
places the action in the hands of crooks - many of them
Dear Nolbert
There are rules for importation of charcoal to the EU one of which is that
the source has to be harvested sustainably. An example of a success
according to this rule is that Senegal is exporting charcoaled extruded
biomass logs made from Tiffa or bulrushes. They have invaded the
Dear Friends
Todd has been tinkering away again and will hit the Eugene Home and Garden
Show this weekend.
http://registerguard.com/rg/life/homeandgarden/31015698-195/albi-stoves-beye
r-rocket-silverfire.html.csp#img_6116735
Please everyone who is building Rocket Stoves note the air
Dear Teddy
This is indeed a very interesting issue you have brought up. Here are some
of my personal anecdotes in regards to this in Kenya.
You have run head-on into probably the most important need in the stove
sector: the need for a comprehensive toolbox of test methods, or the
Dear Vincent
It will help a little. What would really help your overall fuel consumption
however, applies to all stoves of this type which have a flat bottom and no
grate.
Put a metal grid grate at the bottom, elevated perhaps 10-15mm. That takes
up very little vertical space. The grate
Dear Jock
The one area I see too little written about is the economic benefits that a
stove might enable.
You will be interested at some future time to read the social science work
done in Indonesia that notes about 80% of rural homes in Central Java are
using their domestic cooking
Dear Richard and Vincent
Jambo.
I see just about everyone found that adding a grate to a flat-bottomed stove
improves the performance.
RS.I would advise use of round bars as Crispin but I would suggest you
grind any round bars down to result in effectively a series of had cylinders
Dear Samer Again
In particular I will be keen to explore more deeply the ramifications for
testing, actual fuel use, and the memes that relate these to problems of
deforestation and health.
In order to complete the description and not leave the circle incomplete, I
will cover also the
Dear Samer
It is my hope that Cecil Cook will wander through here one day because we
spent a great deal of time looking into these problems
In particular I will be keen to explore more deeply the ramifications for
testing, actual fuel use, and the memes that relate these to problems of
Dear Jason
A common enough machine with the right blade support is a sheet metal
treadle operate notcher. This machine is normally manually operated even in
large workshops.
Here is one
From http://www.bing.com/images/search?q=treadle+notcher+sheet+metal
Dear Erin
What exactly are you objecting to in your first response to Samer's post?
I read the paper carefully and note that you agree on exactly these issues
though Samer does not repeat the block quote because it has been well
covered in other works.
Samer's investigation is into
Dear Doug
Lovely photos of the guillotine.
Here is a suggestion that might be helpful. If you put a link between the
handle and the chip ejector the chip ejector will operate automatically on
the upstroke.
Also, if the right side of the frame were to be cut away and the chip
ejector
Dear Samer
I think you and Saeed have done a really good job of investigating this meme
and how it arose to become a significant element of fundraising for fuel
efficient stoves.
The particular aspect that interests me is how, once started, the 'root' of
the idea which existed in someone's
Dear Dieter
This is an excellent point:
One of many reasons for coupling solar and wood is that there are
additional applications for comfortable use of the solar cooker: baking,
bottling, preparing juice or jam and other products which cannot be prepared
with stoves which work on high
Dear Friends
In preparation for an upcoming improved stove project in Indonesia, the
following research was unearthed about sizes and types of pot in common use.
This will be helpful if you are planning to create a stove that will be
useful in the far East.
Regards
Crispin
Information
Dear Ron
Why would anyone want to use charcoal now when it costs 3 times as much per
GJ
That is a question worth asking. The peri-urban users of charcoal might ask
similar questions about why we buy smart phones when talking face to face is
free.
People spend their money, usually all
Dear Teddy
Samer has been investigating the realities behind certain memes about stoves
and the fact is that certain narrow aspects of a total situation echo better
in an empty chamber so the context, or a lot of it, is removed to highlight
what people want heard most. Unfortunately these
Dear Ron (and others)
Can anyone defend the FAO data collection effort on charcoal?
Not really 'defend' but the FAO tends to collect data only on commercial use
of biomass. They report logging and sales but will miss informal personal
use, often. James Robinson might have something to add
Dear Rolf
Were there some holes between the outer shell and what looks like a charcoal
combustion chamber?
Thanks
Crispin
++
Dear stovers,
last week in Budapest, we visited the very interesting agricultural museum.
Actually, you could call it cultural museum and it is worth while
Dear Friends
This resonates with me very well:
Ranyee Chiang
Certainly from the Global Alliance's point of view, both types of efforts
are important and require different types of tailored support. It would be
useful to hear some discussion about the specifics of the tailored support
that
Dear Kevin
Ron wrote:
The article (peer-reviewed)
You wrote
# If the article was peer reviewed by Geoengineering Peers, that does not
necessarily mean that biochar is good for soils. It only means that
biochar is good for Geoengineering.
This reads as if there is some worthy
.
Thanks
Crispin
From: Tom Miles [mailto:tmi...@trmiles.com]
Sent: Monday, December 23, 2013 2:58 PM
To: bioc...@yahoogroups.com; 'Crispin Pemberton-Pigott'
Cc: 'Gasification-Request'
Subject: RE: [biochar] Pine char gasification
Ron,
This work is very important for both the biochar
Dear Friends
This is a guy pulling in the Christmas trees at a speed that is truly
mind-boggling.
http://www.youtube.com/watch?v=08K_aEajzNA
Happy holidays
Crispin
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Dear Friends
There are a lot of technically capable people subscribed here. This is
something I would have considered technologically impossible and it is
pretty hard to understand how it is done.
http://www.youtube.com/watch?feature=player_detailpage
Thanks Bernhard
Very interesting. A larger one might do for cooking normal meals.
Regards
Crispin
Crispin:
The GoSun Stove is a very young Kickstarter Fundraising Project. More at URL
http://www.gosunstove.com/
They got also a Facebook group account, managed by Matt
Dear Friends
Any use reports on this stove?
Thanks
Crispin
http://www.gosunstove.com/about-us/
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Dear Roger
What a good portrayal of the two stoves. It is immediately noticeable that
the pots used in the larger families are huge. We face the same situation
for Sumba Island where people boil 20 litres of water at a time. The pots
are enormous.
The Noflay Stove looks strong. I can
Dear Friends
Potential Energy is distributing improved stoves in Darfur and this little
report from them is looking for funds. It is succinct and gives numbers.
Regards
Crispin
Today is the second annual Giving Tuesday, a national day of giving.and the
antidote to Black Friday.that
Congrats guys.
Profile of clean stoves is raised another notch!
Regards
Crispin
http://www.businessweek.com/articles/2013-11-29/can-biolites-phone-charging-
stove-cut-wood-pollution-and-save-lives#r=rss
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Dear Paul And All
I second the general approach which is to broaden the footprint of the
topics and to 'keep it current'.
The idea about testing methods is interesting. There are different hoops one
might have to jump through depending on where you are in the world. Test
methods are
Dear Friends
I wrote earlier about the stove selection taking place in Ulaanbaatar for
their Clean Air Programme. Now that they have 4 models being promoted
through year end they are testing performance using different fuels.
This is a test of a TLUD, pretty small, using a semi-coked coal
Dear Marc
Firs I congratulate you on trying to make the engineering aspects of stove
evaluation more accessible to the tinkerers that are genuinely trying to do
something new and useful. Accessible science makes the world a better place.
I've just published an online tool for simple water
Dear Friends
On thin Ice
There is a recent report on emissions and Black Carbon which mentions
cooking stoves and the Clean Stove Initiative in China (CSI).
http://www-wds.worldbank.org/external/default/WDSContentServer/WDSP/IB/2013/
waste. Since the technology has not been patented,
there is also a likelihood that more persons are using it without our
knowledge. I know of at least one group in Germany, who have been supplied
with our kiln.
Yours
A.D.Karve
On Sun, Nov 17, 2013 at 8:27 AM, Crispin Pemberton-Pigott
crispinpig
Dear Friends
The go-to contact person in the region for Permaculture is still Jeunesse
Park at Food and Trees For Africa. There are many activities.
Regards
Crispin
DAn,
Re intensive agriculture, take a look at this site. Its run by a (US)
american Stacia and her Danish hubbie,
Dear AD
What are the numbers for the charcoal dust producers working with sugar cane
leaves?
Price paid for char dust
Price for processing to produce a saleable product
Price paid by customers
Thanks
Crispin
Dear Kevin,
at least in my State (Maharashtra, India), there are
Dear Tom R
So when we provide very hot secondary air into a gas stream at about 700 C it
is (mostly) burning C, not CO? Maybe?
Thanks
Crispin
Dear Richard and All combustors, gasifiers and Pyrolysers:
Good question, Why is the match flame blue near the base, but turns yellow in
Dear Friends
Some list members may not be familiar with the 'rocket' stove mentioned
below. It is actually called a Rocket Mass Heater and is promoted by a few
guys who used to be associated with Aprovecho but works quite differently.
There is one, apparently, here in Ulaanbaatar. I understand
Thanks for the update David.
Also thank you for sharing progress, whatever you can - either descriptions
or drawings. It is good that you have the preheating worked out. While
working on paraffin stoves I found that having too much preheat caused a lot
of free carbon (radicals) which
Dear Dean
The situation in China is interesting because it is so diverse.
In China burning coal instead of wood was established by Mao and it
continues today.
I was surprised to find that a company was manufacturing cast iron downdraft
stoves in Ulaanbaatar ins 1905. I think they have
Dear Dean
That is interesting. I have not seen on of those igniters. I have seen
others but there are more like BBQ lighters.
The Korean multi-hole briquette burner came with tongs to set the bqs in
such a way that air was able to pass vertically through a stack of them -
three high. It
Dear Teddy
Generally speaking the locally made ones are poorly designed, leaky and have
a power spectrum and controllability that meets the local demand. People
also know how to use them.
In Ulaanbaatar the artisanal stoves last from 5 to 10 years but highly
variable. They are quite good
Dear Friends
The air quality of Ulaanbaatar is famously bad because of the ignition of
coal stoves. The majority of stoves have been swapped for very much cleaner
burning ones and the impact is dramatic.
Usually in November the city air has between 500 and 4000 µg of PM2.5
If you visit
Dear Friends
The CSI programme in China is moving to Phase Two.
Regards
Crispin
++
Clean Stove Initiative in China
Beijing, October 31, 2013 - Effective strategies to scale up the
dissemination of clean-burning, fuel-efficient stoves for household cooking
and heating can
Dear Anil
How about using a piece of white typing paper instead of the gavl sheet?
If it works better with reflection, how about a small glass mirror which can be
washed each time before use?
Regards
Crispin liking this combination of smart phone and low tech
Hello Stovers,
Dear Alex E
I think you should make a comment here. And perhaps pass along some of the
photos of Canadians burning gigantic things on farms.
Mike, Alex English has tried more things that most people imagine.
Regards
Crispin
I am looking to build a GIANT retort. I have an unlimited
All things considered, I think I would prefer a retort like the ones made by
Chris Adam. The reason is that the fuel does not burn will in the first
place and because of the dense packing, it will be difficult to properly
supply at least a little air to the centre of the bundle.
The retorts
Thank Nolbert.
The matter is quite important. When designing a stove, the average moisture
content of the fuel actually used means the design must consider how to deal
with it.
Generally speaking, the provision of preheating of secondary and even
primary air is required as the moisture level
in the char?
Kevin
- Original Message -
From: Ronal W. Larson mailto:rongretlar...@comcast.net
To: Crispin Pemberton-Pigott mailto:crispinpig...@gmail.com ; Discussion
of biomass mailto:stoves@lists.bioenergylists.org
Sent: Wednesday, October 23, 2013 2:16 PM
Subject: Re: [Stoves
Dear Robert
That was a great picture. There is a photo book called transporting
Cambodia (without captions) that covers a wide range of vehicles and cargo
that is a real treat. I found it at the airport.
Regards
Crispin
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Subject: Re: [Stoves] Great firewood picture
Dear Crispin can I use this picture on my web site?
Gus
On Wednesday, October 23, 2013 3:51 PM, Crispin Pemberton-Pigott
crispinpig...@gmail.com mailto:crispinpig...@gmail.com wrote:
Dear Robert
That was a great picture
Dear Paul
I can't keep track of who you are sending that to. I will continue here.
NOTE: There is char remaining at the end of the batch. Crispin wants
the unburned char to be counted as fuel used. Others want the char to
be valued as fuel for other stoves or as biochar or as
Dear Paul
Testing centres could report the energy consumption separately it the
customer wants to pay for the tests involved.
It is that simple. The only thing that is going on and on is the desire by
some to figure out a way to give a stove energy credits for energy it has
consumed.
Dear Richard
I was REALLY tempted to make a joke about that at the time but decided l
liked Paul's religious metaphor as it was.
What Ron and perhaps others (are then any left) are coming to grips with is
the termination of misrepresenting fuel consumption through the mechanism of
a dry
Dear Frank
In Africa it is common to see women with 'admirable' arm muscles! I am a big
fan of fuel-reducing stoves because it simple saves so much work.
Regards
Crispin
Dear Crispin,
When I cut and gathered fire wood in New England I wore steel toed shoes,
Levi Strauss pants,
Dear Frank and All
Franks you are beginning to really get a clear picture and I hope to narrow
this down to the essentials. There are too many paragraphs of extraneous
factors to comment comprehensively and most of it leads nowhere so here are
the critical elements:
The first is that how a
Dear Jim and Frank and All
The approach proffered by Frank is to determine the energy content of a ‘fuel
remainder’. I think to is fair to ask why the number is sought and then to be
clear what happens with the number generated. In that way we are clear there is
a good reason to make such a
Dear Tjomi
Try Incledon for the seals.
http://www.incledon.co.za/
I think Stewarts and Lloyds can get it as well. Any SL outlet could order
it as a pipe seal.
Regards
Crispin
Good day Sir/ Madam,
My name is T. Shatika and I am currently working on the project of
Dear Friends
As we are, at the CAU stoves conference, talking about thermal efficiency
tomorrow, here is something to think about.
Efficiency is a ratio, but of what to what? Let us follow the heat and
decide which 'efficiency' we want to report.
1. Heat available in
Dear Friends
Dean has a good point here
The WBT published by VITA was patterned after actual cooking tasks for good
reasons.
The determination of what is a reasonably proxy for local cooking habits is
the foundation of making a successful prediction of the future performance
of a
increments, or custom make them as the required.
Or you can see how many different efficiencies you can fit on the head of a
pin.
Heuristically yours,
Alex
On 13/10/2013 11:21 AM, Crispin Pemberton-Pigott wrote:
Dear Friends
As we are, at the CAU stoves conference, talking about thermal
Dear Frank
This is not really a matter of only determining the heat released from the
fire, unfortunately, though I find you approach inspiring.
Before trying to find a novel method of working out the heat that was
extracted from the fuel by deducting what is left from the original, it is
Dear Paul and Frank
What exactly is the problem that you see that requires a (very) different
type of solution? The proposal is, ultimately, mass-based. Mass-based
calculations of fuel energy are plagued with problems because while you can
get an answer for one type of wood (with a certain
Dear Lanny
It is not really the latent of evaporation that is relevant (though the number
is the same). It is the latent heat of condensation that is generally agreed is
not realisable as useful energy for cooking purposes.
There is a 60 kJ error in it conceptually, however. It does not
Ha ha: Usually 1.32 MJ.kg!
:)
Crispin
What is the difference between
Gross calorific value (dry fuel)
and
Net calorific value (dry fuel)
Used in the WBT spreadsheets?
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Dear Jock
When I read your In the time-temperature-turbulence equation lights went
off.
I would rather hear they went on.
You are quite correct in your analysis, though be careful about generalising
on the other approach.
I expect this is why my iCans with three washers as
Dear Paul
For what it is worth (saving time for others who try) I have looked at both
types of solutions. Do you remember me showing you a conical version of this
in Matsapha in about 2003 on the Vesto stove converted to burn coal with a
chimney and a sunken pot? That was a drop-in
Dear Ron
I agree with Jock that the metric you want depends on the question asked.
The promotion of stoves at a national level is almost always attached to
cleaner air and lower fuel consumption but not always. It depends where it is.
I have seen an opportunity is present for
Dear Ron
Anything more on wood prices in town would be helpful. And for anything
in large quantities.
Any data on the main cooking fuels if not char? Propane, electricity,
etc. Much wood?
The study just finished is being compiled. Early indications are that a
rough split of 40% cooking
Dear Friends
Roger, of this list, has a stove in the running at
http://www.popularmechanics.com/home/improvement/energy-efficient/14-bright-
ideas-for-a-better-wood-stove?click=pm_news#slide-6
Go to page 15 to vote.
He also earned a free commercial at the Super bowl.
Dear Ron
Cecil reported that the cooking tasks are very clearly divided between the
fuels. This holds in principle when there are multiple wood species
available. So in principle, yes cost is a factor but it is also true that it
is not always a dominating factor. If it was people would always
Thanks Erin
This is a technology with a lot of benefits. The ignition emissions of
charcoal stoves in particular, constitute the vast majority of what will be
emitted, total PM.
With the ability to reduce this by 90% a lighting cone can made a
significant difference to the rating of stove
Dear Lanny
This hits a nail on the head.
I could add an inner shell and some insulation to the stove body for about
$5 but if the fuel cost is low the $5 may not be worth the extra fuel
efficiency.
It is called 'additionality'. If the stove won't sell because of the extra
$5, a project may give
Dear AD
I toured a few days ago a 250 kW gasifier built by YDD head Anton. It is a
semi-fluidised bed palm oil waste processing unit with a very interesting
split reactor, one side heated by steam. It has a ceramic catalyst that
looks like clay sand. It produces virtually zero tar. The stuff
Dear Jock
How would we measure the efficiency of such a system, an iCan TLUD, that
provides useful heat for about 70 minutes from about 3 pounds of wood
pellets and also harvests almost 20% of the weight of the feed stock as
charcoal?
The system efficiency (which is the work energy divided by
Greetings Bernhard
I checked this week looking for a value of candle nut shell char and the price
in Yogyakarta is $0.25 per kg.
It is a biomass-rich environment so that is at least part of the explanation
for the difference.
Regards
Crispin
Erich, Lanny,
in Nairobi they sell nearly 1.5kgs
Dear Evan
You are most welcome. Erin is going to post some additional information on
the website in a section on lighting cones. There was some important
information provided by K Lask (Berkeley) with field measurements.
Regards
Crispin
Crispin,
Thank you very much for the
Dear Norbert
Great video. Re the lighting problem, please investigate the use of a
lighting cone as is used on the POCA and the Ang-lo Supra Nova. It is a
metal cone with an appropriate base diameter of about 125mm and a height of
400-500 mm. The top diameter in your case can be 50-75mm. Put a
Dear Nolbert
Please let us know how it goes. It is a solution to a number of ignition
problems and it has only one upfront cost. It is a device that 'does the
blowing'. When it is demonstrated on a charcoal it becomes quite obvious
that there is no smoky period when the user has to wave a piece
!
Regards, Nolbert.
2013/9/30, Crispin Pemberton-Pigott crispinpig...@gmail.com:
Dear Norbert
Great video. Re the lighting problem, please investigate the use of a
lighting cone as is used on the POCA and the Ang-lo Supra Nova. It is
a metal cone with an appropriate base diameter of about
Dear Lanny
It is unusual to find a pot that is taller than it is in diameter. I can't
think of one in common use by ordinary people.
But a soblok (rice steamer) is about 'square'. If you are familiar with
engine stroke and bore, the common pots are 'oversquare'.
The implications are
In Africa most pots have pretty standard or shall I say similar aspect
ratios. A stewing pot tends to be taller but it is rare to find a H/W
(height/width) greater than one outside a restaurant (where the save space
on a crowded cooking surface).
For the ones you have, do you find a consistent
So the stock pot would be a good one for a stability test. What are the
dimensions? Does it have a large radius when the side connects to the
bottom? That reduces the footprint.
Thanks
Crispin
Stock pot about 1;
sauce pot about .63;
and most braziers are about 15 cm tall for all
Dear Nate
I am experimenting with a different form of stability as the chances of a
pot tipping over are not as great as that of a pot falling off. If the
support triangle or square of a stove is relatively then putting on a large
diameter pot is dangerous because it easily falls over spilling
Dear Lanny
With the School Lunch Cooker I let the burner extend 1/25mm above the cook
top and used 2/50mm tall pot holders. This puts the heat on the pot and
shields the stove top with a layer of dead air.
I have another interpretation that may be useful. You did the right thing,
but the
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