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发明名称
摘要
申请公布号
JPS5874273(U)
申请公布日期
1983.05.19
申请号
JP19810170087U
申请日期
1981.11.14
申请人
发明人
分类号
G09B15/02;G09B15/04;(IPC1-7):G09B15/02
主分类号
G09B15/02
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