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发明名称
摘要
申请公布号	JPH0530202(U)	申请公布日期	1993.04.20
申请号	JP19910031586U	申请日期	1991.04.08
申请人		发明人
分类号	E01B3/34;E01B3/46;(IPC1-7):E01B3/34	主分类号	E01B3/34
代理机构		代理人
主权项
地址

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