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发明名称
摘要
申请公布号
JPS55118187(U)
申请公布日期
1980.08.21
申请号
JP19790018818U
申请日期
1979.02.15
申请人
发明人
分类号
G04B19/14;G04B39/00;(IPC1-7):G04B39/00
主分类号
G04B19/14
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