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发明名称
摘要
申请公布号
JPS5421000(Y1)
申请公布日期
1979.07.27
申请号
JP19700021773U
申请日期
1970.03.05
申请人
发明人
分类号
G03B17/38;(IPC1-7):G03B17/38
主分类号
G03B17/38
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代理人
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