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发明名称
摘要
申请公布号
JPS5621155(B2)
申请公布日期
1981.05.18
申请号
JP19760038055
申请日期
1976.04.05
申请人
发明人
分类号
G09B15/00;G09B7/02;G09B15/04
主分类号
G09B15/00
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代理人
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地址
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