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hammer drill英英字典_hammer drill剑桥英语解释_hammer drill柯林斯英文解释_甲百汇小鸡词典
甲百汇小鸡词典

hammer drill

H 开头单词

柯林斯词典

    hammer drill

  • 1. N a rock drill operated by compressed air in which the boring bit is not attached to the reciprocating piston 冲击式钻机; 钻片不在摆动的活塞之上，通过压缩空气操作的岩石钻机

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