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| 21. | maize drill | corn drill |
| 玉米条播机 |
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| 22. | pneumatic turbine dental drill |
| 气动涡轮牙钻 |
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| 23. | open-cut pneumatic rock drill |
| 露天气动凿岩机 |
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| 24. | percussion borer |
| 风钻|凿岩机|冲击式钎子|冲击式钻机 |
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| 25. | When a student recently saw two workmen using a pneumatic drill outside his university, he immediately |
| 最近有位学生，当他看到两名工人正在他的大学外面使用风钻时，便马上给警察局打了电话。 |
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| 26. | water injection air hammer |
| 冲洗风钻；湿式凿岩机 |
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| 27. | drill jig for pneumatic hammer valve |
| 气动锤阀钻模 |
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| 28. | We have grounds for a warrant to jackhammer this floor. |
| 我们该有个许可证 可以把风钻拿来 |
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| 29. | bar rigged drifter |
| 架式风钻，架式凿岩机 |
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| 30. | drill rod; drill steel; borer |
| 钎 |
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