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经营范围
发明名称
摘要
申请公布号
JPS56150974(U)
申请公布日期
1981.11.12
申请号
JP19800049482U
申请日期
1980.04.12
申请人
发明人
分类号
G09B19/02;(IPC1-7):G09B19/02
主分类号
G09B19/02
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代理人
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地址
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