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钻环
tech. drill collar
钻环
: 195 phrases in 23 subjects
Automobiles1
Bridge construction8
Chemistry1
Drilling23
Earth sciences12
Electronics1
Engineering geology22
Explosives and Explosive Ordnance Disposal5
General8
Geophysics1
Hydroelectric power stations4
Mechanics1
Metallurgy1
Nursing3
Oil / petroleum26
Oil and gas technology1
Otorhinolaryngology5
Plastics1
Shipbuilding2
Surgery1
Technology64
Textile industry3
United Nations1

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