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发明名称
摘要
申请公布号	JPH0120560(Y2)	申请公布日期	1989.06.20
申请号	JP19810002408U	申请日期	1981.01.13
申请人		发明人
分类号	E21F1/14;E21D11/38;E21F17/00;E21F17/12;F42D5/00;F42D5/045;F42D5/05;(IPC1-7):F42D5/00	主分类号	E21F1/14
代理机构		代理人
主权项
地址

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