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发明名称
摘要
申请公布号
JPS4630792(Y1)
申请公布日期
1971.10.25
申请号
JP19670048022U
申请日期
1967.06.06
申请人
发明人
分类号
(IPC1-7):G03B17/20
主分类号
(IPC1-7):G03B17/20
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代理人
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