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dulled bit
dril. 磨钝的钻头
oil 磨钝钻头
dull bit
archit. 钝钻头杆头
dril. 磨钝的钻头
oil 钝钻头; 旧钻头; 磨钝钻头
tech. 钝钎头
dulled bit: 10 phrases in 3 subjects
Drilling4
Oil / petroleum4
Technology2