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发明名称
摘要
申请公布号
JPS519743(U)
申请公布日期
1976.01.24
申请号
JP19740079736U
申请日期
1974.07.08
申请人
发明人
分类号
G03B27/50;G03B27/62;G03G15/00;G03G15/04;(IPC1-7):G03B27/62
主分类号
G03B27/50
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