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发明名称
摘要
申请公布号
JPS6230041(Y2)
申请公布日期
1987.08.01
申请号
JP19810115837U
申请日期
1981.08.03
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发明人
分类号
G09B19/02;(IPC1-7):G09B19/02
主分类号
G09B19/02
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