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发明名称
摘要
申请公布号
JPS53109965(U)
申请公布日期
1978.09.02
申请号
JP19770012806U
申请日期
1977.02.05
申请人
发明人
分类号
G09B25/04;(IPC1-7):G09B25/04
主分类号
G09B25/04
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