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井下的
earth.sc. underground
oil subsurface
井下 〔底〕的
gen. downhole
【矿】井下的
gen. underground
井下的: 71 phrases in 17 subjects
Aviation1
Construction1
Drilling31
Earth sciences2
Economy1
Electronics1
Engineering geology4
Explosives and Explosive Ordnance Disposal1
General3
Geophysics3
Life sciences1
Mechanics1
Mining1
Navigation2
Oil / petroleum2
Space2
Technology14

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