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| 上半断面开挖法; 上半断面超前施工法; 顶撑法; 上导坑法; 上导洞法 (开挖隧道); 上部超前掘进法 | |||
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| 顶部导坑法 | |||
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top-heading method : 7 phrases in 4 subjects |
| Engineering geology | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Rail transport | 2 |
| Technology | 2 |
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