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发明名称
摘要
申请公布号
JPS5440091(U)
申请公布日期
1979.03.16
申请号
JP19770113085U
申请日期
1977.08.24
申请人
发明人
分类号
E01F9/00;E01F9/011;G08G1/09;G08G1/095;G09F9/00;(IPC1-7):E01F9/02
主分类号
E01F9/00
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代理人
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