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摘要
申请公布号
JPS52158653(U)
申请公布日期
1977.12.02
申请号
JP19760065869U
申请日期
1976.05.22
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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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