,申请号JP19820115889U-传众专利搜索

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发明名称
摘要
申请公布号	JPS6219755(Y2)	申请公布日期	1987.05.20
申请号	JP19820115889U	申请日期	1982.07.30
申请人		发明人
分类号	E21B19/08;E21B7/02;E21B15/00;E21B19/086;G01V9/00;(IPC1-7):E21C11/00	主分类号	E21B19/08
代理机构		代理人
主权项
地址

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