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发明名称
摘要
申请公布号
JPH0373968(U)
申请公布日期
1991.07.25
申请号
JP19890134001U
申请日期
1989.11.18
申请人
发明人
分类号
G09B3/06;(IPC1-7):G09B3/06
主分类号
G09B3/06
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代理人
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