The contrast between dry screw vacuum pump and rotary piston vacuum pump
Posted on Fri, 14 Dec 2018 02:35:30 +0000
Due to the space simulation device has a volume of the pumping container from thousand cubic meters to tens of thousands of cubic meters, the vacuum pressure changes from from tens of thousands of Pascal to several Pascal, and the pumped gas contains a large amount of water vapor or a part of nit...
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