Dispositif d'extraction du charbon par forage,申请号FR19660085519-传众专利搜索

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发明名称	Dispositif d'extraction du charbon par forage
摘要
申请公布号	FR1502440(A)	申请公布日期	1967.11.18
申请号	FR19660085519	申请日期	1966.11.30
申请人		发明人	PAURAT FRIEDRICH WILHELM
分类号	E21C25/58;E21C35/00;E21F7/00	主分类号	E21C25/58
代理机构		代理人
主权项
地址

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