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| 巷道断面巷道横截面称为巷道断面。它根据巷道的开挖目的、用途以及开挖作业确定 | |||
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| 导坑断面; 隧道开挖断面尺寸; 木桩; 柱脚桩 | |||
| cross section of heading: 5 phrases in 4 subjects |
| Bridge construction | 1 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Refrigeration | 1 |
| Technology | 1 |
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