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| 71. | The throat of a mine |
| 矿井的巷道口 |
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| 72. | vertical shaft fulcrum shaft sleeve |
| 竖轴支点轴套 |
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| 73. | mine characteristic curve |
| 矿井通风特性曲线 |
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| 74. | mine characteristic |
| 矿井通风阻力特性 |
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| 75. | mine total head |
| 矿井通风兑压头 |
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| 76. | mine gas drainage plant |
| 矿井瓦斯排泄装置 |
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| 77. | rock bit sharpening machines |
| 矿井钻头刃磨床 |
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| 78. | volumetric efficiency of mine air |
| 矿井通风容积效率 |
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| 79. | They descended into the mine. |
| 他们下矿井去了。 |
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| 80. | has positioned the flat motor crosswise in a double-tube frame and transmitted its power via a cardan shaft |
| 为了改进该车的冷却效果，首席设计师Max Friz将原来的扁平发动机放置在双管框架上，并直接通过一个Cardan shaft将动力传输到车轮。 |
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