Notice that now-days many of the "standard" SI units are named for
long-dead scientests

Volt,
Ampere,
Watt,
Henry,
Farad,
Joule,
Hertz,
Newton,
Pascal,
Celsus,
Kelvin,

Likely a lot more I can't remember.  If you know a little history you
can remember them.   I think that is why they use proper names,
because each has a back-story making it easier to remember.  If you
know some history of science the unit names are impossible to forget.
They even changed the names of some old units to make them proper
names.  We used to say  "Cycles" but now use "Hertz" and we used to
use "Centigrade" but now "Celsius".

So in this case, read a little about  Blaise Pascal.   He did many
experiments with barometers so they named the unit of pressure
(Newtons per square meter) after him.  Likewise, it was Newton who
un-scrambled the difference between force, weight, and mass so the
unit of force is Newton.

By now we all know what "0.8 MPa" means.  It is 0.8 million newtons
per square meter.

>
> > Operating pressure 0.15~0.8MPa supposed to tell me??? Need a translation
> > from chinglish please. I haven't a clue what the heck 0.8MPa means.

-- 

Chris Albertson
Redondo Beach, California


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