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reverse circulation
dril. 反循环
earth.sc. 反循环〔洗孔〕
eng.geol. 逆循环; 反冲洗
tech. 逆转循环
reverse circulation: 62 phrases in 10 subjects
Bridge construction3
Desert science1
Drilling2
Earth sciences4
Engineering geology9
Explosives and Explosive Ordnance Disposal1
Hydroelectric power stations2
Mechanics1
Oil / petroleum9
Technology30

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