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换气泵
avia. scavenge pump
ecol. scavenger pump
tech. scavenging air pump
换气〔清洗，回油，扫线用〕泵
mech.eng. scavenger pump
换气〔扫气，回油，清洗，清除，抽出，扫线用〕泵
mech.eng. scavenging pump

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