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发明名称
摘要
申请公布号
JPS55175131(U)
申请公布日期
1980.12.16
申请号
JP19790076021U
申请日期
1979.06.05
申请人
发明人
分类号
G03B27/54;G03G15/04;(IPC1-7):G03B27/54
主分类号
G03B27/54
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