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| 71. | horseshoe tunnel |
| 马蹄形隧道 |
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| 72. | tunnel structure |
| 隧道构筑物 |
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| 73. | tunnel ventilation shaft |
| 隧道通风井 |
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| 74. | recovery vehicle [tunnel] |
| 救援车辆〔隧道〕 |
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| 75. | tunneling excavation |
| 隧道开挖 |
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| 76. | Cheung Tsing Tunnel |
| 长青隧道 |
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| 77. | syncline tunnel |
| 向斜隧道 |
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| 78. | annealing trunnel |
| 退火隧道 |
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| 79. | subway lighting |
| 隧道照明设备 |
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| 80. | tunnel breakdown |
| 隧道哗 |
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