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French-English Translation of
Old French Mechnical

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Old French Mechnical Drawings  
by JayAndrews, 2018-07-14, 18:46  like dislike  Spam?  71.232.82...
Hi, I'm Jay.

I'm working on a project in which I am responsible for converting old (circa 1950-1970) French "blue-print" machine drawings into English in modern computerized drawings.

Most words I have been able to figure out with the help of google, but there are a few abbreviations that I'm stuck on.  

The current elusive abbreviation is PM after a dimension number, for example  <---14.6±0.1 PM--->  I might have guessed before or after any coatings, but there are no coatings called out.

Thanks in advance for any help.

found something...  #894719
by matthieu- (FR/US), 2018-08-01, 19:15  like dislike  Spam?  
Are you certain it is written with both P and M in capital letters ?

There are 2 dimension units using both P and M....but they are Pm and pm.

Pm = Pétamètre, une unité de mesure valant 10^15 mètres
pm = picomètre, une unité de mesure valant 10^−12 mètre (±computer component size)

one very big, the other very small...
Hope that helps,

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