安太堡露天煤矿排土场
Dump of Antaibao Opencast Coal Mine
草原露天矿区
prairie opencast coalmine
大露天常规开采
Conventional mining for large open pit
大型化、露天化、集约化工厂布置
Large
open and in-tensive layout of plant
大型露天矿山
Large-scale open-pit mine
低位露天布置
low-position outdoor arrangement
地下转露天开采
the change from underground mining into open mining
抚顺市西露天矿
western opencast coal mine