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to phrases
pump down
construct. 抽气〔空〕; 降压
dril. 泵送
mining. 泵抽降低液面
refrig. 抽空
pump down
: 27 phrases in 11 subjects
Aviation1
Drilling2
Electronics2
Engineering geology1
Mechanics1
Metallurgy2
Mining3
Nautical1
Oil / petroleum7
Refrigeration2
Technology5

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