| 词汇 | jackhammer |
| 释义 | jack·ham·merBrE /ˈdʒækhæmə(r)/ NAmE /ˈdʒækhæmər/ (NAmE ) (BrE pneuˌmatic ˈdrill ) noun a large powerful tool , worked by air pressure , used especially for breaking up road surfaces 风钻;气动凿岩机 |
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