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发明名称
摘要
申请公布号
JPH0443837(Y2)
申请公布日期
1992.10.15
申请号
JP19870031644U
申请日期
1987.03.04
申请人
发明人
分类号
G04G5/04;G04C21/16;G04C21/36;G04G13/02;(IPC1-7):G04G13/02
主分类号
G04G5/04
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