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发明名称
摘要
申请公布号
JPS5733433(Y2)
申请公布日期
1982.07.23
申请号
JP19790021685U
申请日期
1979.02.21
申请人
发明人
分类号
G04B37/00;(IPC1-7):G04B37/00
主分类号
G04B37/00
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