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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_果味酸柯林斯词典
果味酸柯林斯词典

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 沖擊式鑽機; 鑽片不在擺動的活塞之上，通過壓縮空氣操作的巖石鑽機

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