冲唤截煤机 percussive coal cutter ; percussion cutting machine ; pick mining machine ; coal puncher 截煤机割齿 cutter bit ; cutter pick 电动截煤机 electric coal cutter ..
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... percussion boring ①冲击钻探，冲击式钻进②冲击式凿岩 percussion cutting machine 冲击式切割机 percussion device 撞击装置 ...
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