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to phrases
bit penetration
dril.
钻进
;
钻头切入深度
eng.geol.
钻头贯入度
expl.
钻头吃人深度
oil
钻头吃入深度
;
钻头进尺速度
tech.
机械钻速
bit penetration:
1 phrase
in 1 subject
Drilling
1
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