打竖井 meaning in Chinese
shaft excavation
shaft sinking
Examples
- Shaft sinking - abutment for guide ropes - safety requirements and testing
打竖井.导向钢丝绳用支座.安全要求和试验 - Shaft sinking - riders for winding kibbles - safety requirements and testing
打竖井.提升吊桶导向架.安全性要求和试验