STAIRCASE SYSTEM OF EXPLOITATION IN GREATLY INUNDATED MINERAL RESOURCES BED,申请号BG19750030784-传众专利搜索

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发明名称	STAIRCASE SYSTEM OF EXPLOITATION IN GREATLY INUNDATED MINERAL RESOURCES BED
摘要
申请公布号	BG27660(A1)	申请公布日期	1979.12.12
申请号	BG19750030784	申请日期	1975.08.12
申请人	NIKOLOV,NENO B.;POPOV,IVAN M.;STOJANOV,FILIP N.;VLEV, TODOR JA.;MARINOV,ANGEL D.	发明人	NIKOLOV,NENO B.;POPOV,IVAN M.;STOJANOV,FILIP N.;VLEV, TODOR JA.;MARINOV,ANGEL D.
分类号	E21C41/00;(IPC1-7):E21C41/00	主分类号	E21C41/00
代理机构		代理人
主权项
地址

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