| 单词 | pneumatic drill |
| 释义 | pneumatic drillBrE /njuːˌmætɪk ˈdrɪl/ NAmE /nuːˌmætɪk ˈdrɪl/ (BrE ) (NAmE jack·ham·mer ) noun a large powerful tool , worked by air pressure , used especially for breaking up road surfaces 气钻 |
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