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发明名称
摘要
申请公布号
JPS448052(Y1)
申请公布日期
1969.03.27
申请号
JP19650091478U
申请日期
1965.11.12
申请人
发明人
分类号
G03B17/56;G02B15/10;(IPC1-7):G03B17/56
主分类号
G03B17/56
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代理人
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