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钻杆组
eng.geol. stand
tech. drill steel set; drill string; string of drill pipes
钻杆组一套完整的不同长度的一组钻杆。钻杆的长度每增加0. 8m,钻头的直径减小 1mm
expl. drill series
钻 杆 组
: 11 phrases in 3 subjects
Drilling5
General2
Technology4

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