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取心钻进 qǔxīn zuānjìn
earth.sc. cored; coring
oil core boring; core drilling
取心钻进钻进时,在孔底保留岩心，并主要以提取出的岩心来研究了解地下地质情况的钻进方法 qǔxīn zuānjìn
expl. core drilling; core boring
取心钻进: 21 phrases in 5 subjects
Drilling9
Earth sciences2
Explosives and Explosive Ordnance Disposal3
Oil / petroleum5
Technology2

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