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发明名称
摘要
申请公布号
JPS5590972(U)
申请公布日期
1980.06.23
申请号
JP19780175762U
申请日期
1978.12.19
申请人
发明人
分类号
G04B19/14;G04B37/05;(IPC1-7):G04B19/14
主分类号
G04B19/14
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