首页>
外国专利>
METHOD OF MINING A THICK STEEP MINERAL BED WITH GOAF-FILLING
METHOD OF MINING A THICK STEEP MINERAL BED WITH GOAF-FILLING
展开▼
机译:采煤法开采厚厚矿床的方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
the invention относитс to mining industry and позвол ет reduce labor input and increase the safety of mining. the development of the lead in the нисход щем пор дке подэтажами on простиранию. the firs
展开▼