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drill diamond
oil 钻井用金刚石
tech. 钻探用金刚石
drill diamond
: 62 phrases in 13 subjects
Construction1
Drilling3
Earth sciences3
Electronics5
Engineering geology3
Explosives and Explosive Ordnance Disposal1
General3
Mechanics2
Metallurgy5
Oil / petroleum9
Space1
Technology25
Water resources1

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