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发明名称
摘要
申请公布号	JPS6158253(U)	申请公布日期	1986.04.19
申请号	JP19840140044U	申请日期	1984.09.14
申请人		发明人
分类号	E21B10/44;E02F3/06;E21B3/00;(IPC1-7):E02F3/06	主分类号	E21B10/44
代理机构		代理人
主权项
地址

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