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bit shank
dril. 牙轮钻头巴掌的接头部分
expl. 钎尾插人凿岩机内的钎杆的尾端
mech. 钻头柄部
oil 钻头顶部接头
tech. 钻杆; 钻头丝扣部分; 钻坯; 钎尾; 钎柄
bit shank: 6 phrases in 2 subjects
Automobiles4
Technology2