贵冶转炉风口座送风系统采用弹子与金属密封环密封。弹子磨损及有铜水溅入损环时,需经常更换新的弹子。而要更换弹子就必须先拆除......

Rubybearingmarbles of the Southern Ural Mountains are developed in the metamorphic perimeter of granitesgneisses dom......