,申请号JP19790031812U-传众专利搜索

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发明名称
摘要
申请公布号	JPS55131400(U)	申请公布日期	1980.09.17
申请号	JP19790031812U	申请日期	1979.03.13
申请人		发明人
分类号	E21B10/46;E21C35/18;E21D9/08;E21D9/087;(IPC1-7):E21D9/08	主分类号	E21B10/46
代理机构		代理人
主权项
地址

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