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发明名称
摘要
申请公布号
JPS5734525(Y2)
申请公布日期
1982.07.30
申请号
JP19790079675U
申请日期
1979.06.12
申请人
发明人
分类号
G09B1/02;G02B25/00;G09B19/00;(IPC1-7):G09B19/00
主分类号
G09B1/02
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