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bridg.constr. 冲击钻; 冲击钻头
eng.geol. 鑿頭; 衝擊鑽頭
tech. 凿尖; 剁碎钻头; 顿钻钻头; 冲击钻头; 扁凿钻头; 扁铲钻头
chopping bit
: 4 phrases in 2 subjects
Oil / petroleum1
Technology3