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valve cock [,vælv'kɔk]
dril. 旋塞
eng.geol. 旋塞阀
met. 阀栓
tech. 龙头阀
valve cock: 10 phrases in 7 subjects
Aviation1
Compressors2
Metallurgy1
Oil / petroleum1
Shipbuilding1
Solar power1
Technology3