METHOD OF EXPLOITING ORE DEPOSITS OF MORE THAN 4.5 M SEAM THICKNESSA SVYSHE 4,5 M,申请号PL19780205663-传众专利搜索

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发明名称	METHOD OF EXPLOITING ORE DEPOSITS OF MORE THAN 4.5 M SEAM THICKNESSA SVYSHE 4,5 M
摘要
申请公布号	PL117923(B1)	申请公布日期	1981.09.30
申请号	PL19780205663	申请日期	1978.03.28
申请人		发明人
分类号	E21C;(IPC1-7):E21C41/06	主分类号	E21C
代理机构		代理人
主权项
地址

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