Post by slindo on Mar 28, 2007 5:33:48 GMT -8
I am trying to put together a short history of high pressure gas cylinders. I've been unable to find when the 3AA specification was created, and neither the DOT nor the CGA seem to know either.
Best we can figure, it was somewhere between 1923 and 1949. As a backdoor methods of finding out, I'm curious what the oldest 3AA tanks anyone here can remember seeing might be.
Best we can figure, it was somewhere between 1923 and 1949. As a backdoor methods of finding out, I'm curious what the oldest 3AA tanks anyone here can remember seeing might be.
