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81. | tunnel piercing |
| 隧道掘进 |
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82. | Tunneling Engineer |
| 隧道工程师 |
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83. | twin-tube tunnel |
| 双管隧道 |
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84. | localized tunnel |
| 定位隧道 |
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85. | Shing Mun Tunnel |
| 城门隧道 |
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86. | tunnel phenomenon |
| 隧道现象 |
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87. | single-track tunnel |
| 单线隧道 |
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88. | tunnel reconstruction work |
| 隧道改建工程 |
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89. | tunnel diameter |
| 隧道直径 |
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90. | load-out tunnel |
| 装载隧道 |
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