service shaft meaning in English
辅助井筒
辅助矿井
辅助竖井
供应设施用竖井
交通井
Examples
- Connecting survey of the deepening of blind service shaft
盲副井延深的贯通测量 - Design of the hoist house of service shaft with multi - rope friction hoist
浅谈设计多绳摩擦式副立井提升机房
辅助井筒
辅助矿井
辅助竖井
供应设施用竖井
交通井