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发明名称
摘要
申请公布号
JPS5236569(Y1)
申请公布日期
1977.08.20
申请号
JP19680070827U
申请日期
1968.08.19
申请人
发明人
分类号
G03B17/42;G03B1/60;G03B17/36;(IPC1-7):G03B1/60
主分类号
G03B17/42
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代理人
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