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摘要
申请公布号
JPS5682594(U)
申请公布日期
1981.07.03
申请号
JP19790158581U
申请日期
1979.11.15
申请人
发明人
分类号
G04G9/00;G04B19/30;G04C3/00;G04C3/14;G04C17/00;G04G9/02;(IPC1-7):G04G9/02
主分类号
G04G9/00
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