煤矿许用水胶炸药
the coal mining permissible water gel explosives
Water Gal Explosive for Coal-Mine
煤矿许用乳化炸药
permissible emulsion explosive
Permissible Emulsion Explosive for Coal-mine
permitted emulsion explosive for coalmine
煤矿许用膨化硝铵炸药
expanded ammonium nitrate explosive
煤矿许用粉状乳化炸药
permitted powdered emulsion explosive
permitted powdery emulsion explosive
煤矿许用爆破器材
coal mine permissible explosives
煤矿许用
Coal mine
permissible
coal-mining permissible explosive
煤矿巷道设计系统
coal mine tunnel design system