At a 1950 GE TV tubes factory

Zetu Harrys 5/07/2022 03:28:00 PM

 

TV tubes need vacuum for several things. At this General Electric factory (years is 1950), air is pumped out for coating inside with aluminum, then readmitted while working parts are put in, and finally pumped out again.



Zetu Harrys

Posted by Zetu Harrys