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31. | Bore check |
| 精密小测定器 |
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32. | excavated diameter |
| 挖掘直径 |
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33. | excavating gear |
| 挖掘装置 |
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34. | bore jackleg |
| 钻架 |
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35. | excavation bottom |
| 挖掘基底 |
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36. | calibre; Bore |
| 口径 |
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37. | footing excavation |
| 基础挖掘 |
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38. | bore evacuation |
| 炮膛吹气 |
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39. | tap production potential |
| 挖掘生产潜力 |
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40. | cylindrical bore |
| 圆柱形内孔 |
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