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scavenger pump
ecol. 换气泵; 清除泵
mech.eng. 换气〔清洗,回油,扫线用〕泵
oil 扫线泵
refrig. 清洗泵
tech. 回油泵
scavenger pump: 3 phrases in 3 subjects
Compressors1
Oil / petroleum1
Technology1