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jackhammer

noun
/ˈdʒækhæmə(r)/
/ˈdʒækhæmər/
(North American English)
(British English pneumatic drill)
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  1. a large powerful tool, worked by air pressure, used especially for breaking up road surfaces风钻;气动凿岩机
BNC: 0 COCA: 24275
BNC: 0 COCA: 24275

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