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发明名称
摘要
申请公布号
JPS4725540(Y1)
申请公布日期
1972.08.09
申请号
JP19680025418U
申请日期
1968.03.30
申请人
发明人
分类号
(IPC1-7):G03B17/26;G03C3/00
主分类号
(IPC1-7):G03B17/26
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