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发明名称
摘要
申请公布号
JPS6443306(U)
申请公布日期
1989.03.15
申请号
JP19870138870U
申请日期
1987.09.11
申请人
发明人
分类号
G02B6/28;(IPC1-7):G02B6/28
主分类号
G02B6/28
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代理人
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