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发明名称
摘要
申请公布号
JPS57172437(U)
申请公布日期
1982.10.30
申请号
JP19810059170U
申请日期
1981.04.23
申请人
发明人
分类号
G03B27/62;G03G15/04;G03G15/05;(IPC1-7):G03B27/62
主分类号
G03B27/62
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