System for relieving secondary micro-pressure waves of high-speed railway tunnel
Method for disassembling double-layer shell shield tunneling machine in tunnel
Underground pneumatic monorail hoist and intelligent control system thereof
Combined type light ultra-soft foundation reinforcing platform and method
Environment-friendly seabed mineral resource development device and development method
Transportation sledge for under-pressure operation equipment
Oil-electricity hybrid power rope-tightening-free workover rig
Special device for mounting head part of reversed loader
Mine plot aerial seeding vegetation recovery method based on unmanned aerial vehicle
Split type coal mining machine carrier and speed synchronization method
Mining area ground surface gas overflow dynamic monitoring and intelligent safety evaluation method