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发明名称
摘要
申请公布号
JPS5891741(U)
申请公布日期
1983.06.21
申请号
JP19810186969U
申请日期
1981.12.15
申请人
发明人
分类号
G03B17/04;G03B17/56;(IPC1-7):G03B17/04
主分类号
G03B17/04
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