Access to rough vacuum is the main one of vacuum equipment.
是获得粗真空的主要真空设备之一。
LS series wet roots vacuum pump is a rough vacuum pumping equipment.
LS型直排大气湿式罗茨真空泵属粗真空获得设备。
Is a rough vacuum, one of the major vacuum equipment.
是获得粗真空的主要真空设备之一。
Is a rough vacuum, one of the major vacuum equipment.
是获得粗真空的主要真空设备之一。
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