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| 打竖〔直〕井 | |||
| 凿井; 井筒掘进在立井施工中按设计井位和断面进行井筒开挖和临时支护的作业。井筒掘进有掘进破岩、掘进排矸、井筒临时支护等工序 | |||
| 沉井; 向下打竖井; 凿竖井; 挖竖井; 竖井沉陷; 打直井; 打竖井 | |||
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| 竖井挖沉法; 沉井; 沉箱工程挖沉法 | |||
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shaft sinking : 32 phrases in 4 subjects |
| Architecture | 1 |
| Explosives and Explosive Ordnance Disposal | 6 |
| Hydroelectric power stations | 1 |
| Technology | 24 |
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