,申请号FR19740035123-传众专利搜索

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发明名称
摘要
申请公布号	FR2248404(B1)	申请公布日期	1978.06.09
申请号	FR19740035123	申请日期	1974.10.18
申请人	COAL INDUSTRY PATENTS LTD	发明人
分类号	E21C29/10;E21C35/12;(IPC1-7):E21C29/10	主分类号	E21C29/10
代理机构		代理人
主权项
地址

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