保护层爆破
Protection layer blasting
protective level blasting
爆破安全规程
Safety regulations for blasting practices
safety regulations for blasting
Rules of Explosion Safety
Safety Specifications of blasting
爆破安全技术
Technology of safe blasting
爆破安全检测
blasting safety monitoring
爆破安全判据
Judging Standard of Blasting Vibration Safety
爆破安全评价
blasting safety assessment
爆破安全校核
Security checking of blasting
爆破暗挖法
blasting subsurface excavation method