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发明名称
摘要
申请公布号	JP2781638(B2)	申请公布日期	1998.07.30
申请号	JP19900081279	申请日期	1990.03.30
申请人		发明人
分类号	E01H1/08;E01H1/00;E01H15/00;E21F17/00;(IPC1-7):E01H1/00	主分类号	E01H1/08
代理机构		代理人
主权项
地址

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