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发明名称
摘要
申请公布号
JPS6221989(Y2)
申请公布日期
1987.06.04
申请号
JP19820082534U
申请日期
1982.06.03
申请人
发明人
分类号
G04B45/00;G04C3/02;G04C3/027;(IPC1-7):G04C3/027
主分类号
G04B45/00
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代理人
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