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| 21. | mine drainage gas |
| 矿井气 |
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| 22. | from bank to bank |
| 从下矿井到出矿井 |
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| 23. | An inclined or vertical shaft or passage between levels in a mine. |
| 小暗井矿井里层与层之间倾斜的或垂直的竖坑或通道 |
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| 24. | colliery working day |
| 矿井工作日 |
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| 25. | By determining the ventilation resistance of the mine shaft ventilation system, it is found that the |
| 通过对矿井通风系统进行通风阻力测定,发现矿井回风段通风阻力过大且通风难易程度为中等。 |
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| 26. | mine haulage |
| 矿井运输 |
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| 27. | To make shaft coal cutting planning is a multi nodal decision making course for it's intricacy of influencing |
| 矿井采煤计划编制影响因素复杂,是一个多环节的综合决策过程。 |
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| 28. | mining geology |
| 矿井地质 |
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| 29. | mine automation |
| 矿井自动化 |
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| 30. | pithead coal preparation plant |
| 矿井选煤厂 |
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