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| 21. | main workings plan |
| 主要巷道平面图 |
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| 22. | diagram on the plane of the equinoctia |
| 赤道平面图 |
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| 23. | floor plan |
| 楼面平面图 |
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| 24. | nautical planisphere |
| 航海用平面图 |
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| 25. | plain indicator |
| 平面图显示器 |
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| 26. | ventilation plan |
| 通风系统平面图 |
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| 27. | projected planform |
| 投影平面图 |
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| 28. | mining engineering plan |
| 采掘工程平面图 |
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| 29. | Adit planimetric |
| 坑道平面图 |
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| 30. | project site plan |
| 工程地盘平面图 |
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