METHOD OF EXPLOITING STEEP DEPOSITS AND APPARATUS THEREFOR,申请号PL19780204325-传众专利搜索

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发明名称	METHOD OF EXPLOITING STEEP DEPOSITS AND APPARATUS THEREFOR
摘要
申请公布号	PL114793(B1)	申请公布日期	1981.02.28
申请号	PL19780204325	申请日期	1978.01.28
申请人		发明人
分类号	E21C;E21C41/00;(IPC1-7):E21C41/00	主分类号	E21C
代理机构		代理人
主权项
地址

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