underground opening meaning in Chinese
地下开挖
地下孔洞
Examples
- Bilt support study of the broken soft rockmass around underground openings
破碎松软岩巷锚杆支护研究 - Standard guide for geotechnical mapping of large underground openings in rock
岩石中大型地下巷道地质技术图绘制的标准指南 - Support and control technology for underground openings at depth with rockburst tendency
有岩爆倾向的深井巷道岩层支护控制技术 - Distribution density method for optimization of spacing and cross section of underground openings
地下洞室断面和间距优化计算的分布密度法 - Layout and monitoring - controlling design of underground openings and tunnels for longtan hydropower station
龙滩水电站地下洞室群布置及监控设计