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发明名称
摘要
申请公布号	JPH0386198(U)	申请公布日期	1991.08.30
申请号	JP19890148246U	申请日期	1989.12.21
申请人		发明人
分类号	E21D11/08;E21D11/38;(IPC1-7):E21D11/08	主分类号	E21D11/08
代理机构		代理人
主权项
地址

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