Comment metalica SNF 2011-03-22 18:48:37: Roughing pump valve

carterlin at snf.stanford.edu carterlin at snf.stanford.edu
Tue Mar 22 18:48:37 PDT 2011


The valve seems newly installed. It gives the false impression of unable to open after closed, but after deposition, venting, and turning on the roughing, it allows user to open the valve again




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