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发明名称
摘要
申请公布号
JPH0398472(U)
申请公布日期
1991.10.14
申请号
JP19900005647U
申请日期
1990.01.26
申请人
发明人
分类号
G09B9/04;G09B9/28;(IPC1-7):G09B9/28
主分类号
G09B9/04
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代理人
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