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| 水平巷道水平掘进的平硐。在地上，从某一工作场所开挖通向其他场所的通道。小断面的平硐称巷道，大断面的平硐叫水平大巷 | |||
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| 位置水头 | |||
| level heading: 4 phrases in 4 subjects |
| Aviation | 1 |
| Engineering geology | 1 |
| Polygraphy | 1 |
| Sports | 1 |
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