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发明名称
摘要
申请公布号
JPS6090482(U)
申请公布日期
1985.06.20
申请号
JP19830182029U
申请日期
1983.11.25
申请人
发明人
分类号
G09B21/00;G09B29/00;G09B29/10;(IPC1-7):G09B21/00
主分类号
G09B21/00
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代理人
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