Perfectionnement aux appareils de sondage sans tubage,申请号FRD974680-传众专利搜索

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发明名称	Perfectionnement aux appareils de sondage sans tubage
摘要
申请公布号	FR974680(A)	申请公布日期	1951.02.23
申请号	FRD974680	申请日期	1948.11.05
申请人		发明人	COU:ARD ANDRE-FELIX-EMILE
分类号	E02D1/02	主分类号	E02D1/02
代理机构		代理人
主权项
地址

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