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发明名称
摘要
申请公布号	JPH0254889(U)	申请公布日期	1990.04.20
申请号	JP19880133021U	申请日期	1988.10.11
申请人		发明人
分类号	E21D9/06;(IPC1-7):E21D9/06	主分类号	E21D9/06
代理机构		代理人
主权项
地址

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