Perfectionnements aux dispositifs à charges creuses utilisés à l'intérieur des sondages,申请号FRD1029798-传众专利搜索

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发明名称	Perfectionnements aux dispositifs à charges creuses utilisés à l'intérieur des sondages
摘要
申请公布号	FR1029798(A)	申请公布日期	1953.06.05
申请号	FRD1029798	申请日期	1950.12.18
申请人	SOCIETE DE PROSPECTION ELECTRIQUE	发明人
分类号	E21B43/118	主分类号	E21B43/118
代理机构		代理人
主权项
地址

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