Procédé de perforation thermique des roches dures naturelles ou artificielles,申请号FRD952671-传众专利搜索

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发明名称	Procédé de perforation thermique des roches dures naturelles ou artificielles
摘要
申请公布号	FR952671(A)	申请公布日期	1949.11.22
申请号	FRD952671	申请日期	1944.08.10
申请人	L'AIR LIQUIDE	发明人
分类号	E21B7/14	主分类号	E21B7/14
代理机构		代理人
主权项
地址

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