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hole drilling
bridg.constr. 钻孔
expl. 炮孔法二次凿岩
tech. 钻孔工作
hole drilling
: 119 phrases in 12 subjects
Architecture2
Automobiles3
Drilling12
Earth sciences2
Electronics3
Engineering geology12
Explosives and Explosive Ordnance Disposal13
Hydroelectric power stations2
Mechanics1
Oil / petroleum16
Shipbuilding1
Technology52