prepump

常见例句

The design parameters of anodic protection coolers and the reason why to choose a prepump process are presented.
介紹陽極保護濃硫酸冷卻的設計蓡數,選用泵前流程的原因,重點討論冷卻水路的設計方案。
Note: ZJ type Roots vacuum pump can't discharge gases directly into the air,it should be equipped with a cowesponding prepump at operation.
注：ZJ型羅茨真空泵不能直排大氣，運行時需配備相應前級泵。