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发明名称
摘要
申请公布号	JPH0220250(Y2)	申请公布日期	1990.06.04
申请号	JP19840021650U	申请日期	1984.02.20
申请人		发明人
分类号	E01D11/00;B25B25/00;E01D4/00;E01D11/02;E01D11/04;E01D19/16;(IPC1-7):E01D11/00	主分类号	E01D11/00
代理机构		代理人
主权项
地址

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