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发明名称
摘要
申请公布号
JPS647397(Y2)
申请公布日期
1989.02.28
申请号
JP19840109848U
申请日期
1984.07.20
申请人
发明人
分类号
G02B7/00;G06K7/10;(IPC1-7):G06K7/10
主分类号
G02B7/00
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