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发明名称
摘要
申请公布号
JPH0234700(Y2)
申请公布日期
1990.09.18
申请号
JP19830093680U
申请日期
1983.06.18
申请人
发明人
分类号
G09B15/00;G10G1/02;(IPC1-7):G09B15/00
主分类号
G09B15/00
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