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申请公布号
JPS53115069(U)
申请公布日期
1978.09.13
申请号
JP19770020069U
申请日期
1977.02.21
申请人
发明人
分类号
G04G13/02;G04B23/03;G04C21/16;G04C23/04;H01H3/00;(IPC1-7):G04C21/16
主分类号
G04G13/02
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