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thread angle
compr. 螺纹牙型角
dril. 螺纹牙形角
oil 螺纹牙形角
plast. 螺纹角
tech. 螺纹断面角
thread angle: 15 phrases in 6 subjects
Automobiles2
Electric machinery2
Metallurgy1
Plastics1
Technology6
Textile industry3