,申请号FRD1598578-传众专利搜索

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发明名称
摘要
申请公布号	FR1598578(A)	申请公布日期	1970.07.06
申请号	FRD1598578	申请日期	1968.12.20
申请人		发明人
分类号	E21B33/128	主分类号	E21B33/128
代理机构		代理人
主权项
地址

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