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fastening screw
auto. 紧固夹紧螺钉
bridg.constr. 连接螺钉
dril. 紧固螺丝; 固定螺丝
el.mach. 夹紧螺钉
met. 紧固螺钉
oil 固定螺钉
fastening screw
: 6 phrases in 3 subjects
Computer numerical control1
Oil / petroleum2
Technology3