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发明名称
摘要
申请公布号
JPS5245217(Y2)
申请公布日期
1977.10.14
申请号
JP19720147674U
申请日期
1972.12.25
申请人
发明人
分类号
G03B17/02;G03B1/48;G03B17/00;G03B17/08;G03B17/28;(IPC1-7):G03B17/28
主分类号
G03B17/02
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