METHOD OF WORKING COAL BEDS,申请号SU19904882287-传众专利搜索

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发明名称	METHOD OF WORKING COAL BEDS
摘要
申请公布号	RU1774013(C)	申请公布日期	1992.11.07
申请号	SU19904882287	申请日期	1990.10.10
申请人	KOMMUNARSKIJ GORNO-METALLURGICHESKIJ INSTITUT	发明人	CHERNOKALOV NIKOLAJ I,SU
分类号	E21C41/18	主分类号	E21C41/18
代理机构		代理人
主权项
地址

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