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发明名称
摘要
申请公布号
JPS572994(Y2)
申请公布日期
1982.01.19
申请号
JP19770000718U
申请日期
1977.01.10
申请人
发明人
分类号
G03B27/54;G03B27/32;G03G15/04;(IPC1-7):G03G15/04
主分类号
G03B27/54
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