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发明名称
摘要
申请公布号
JPS462945(Y1)
申请公布日期
1971.02.01
申请号
JP19700008660U
申请日期
1970.01.29
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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代理人
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