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封闭孔
el.mach. closed bore
封闭
met. closed pore
封闭孔
tech. closed pore
水泥封闭孔
eng.geol. injected hole
封闭
met. blind hole
封闭 孔: 29 phrases in 9 subjects
Electric machinery1
Electronics1
Explosives and Explosive Ordnance Disposal4
Hydroelectric power stations2
Metallurgy1
Oil / petroleum6
Plastics1
Technology12
Wood processing1