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发明名称
摘要
申请公布号
JPS5997495(U)
申请公布日期
1984.07.02
申请号
JP19820193609U
申请日期
1982.12.21
申请人
发明人
分类号
G04B45/00;(IPC1-7):G04B45/00
主分类号
G04B45/00
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代理人
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