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经营范围
发明名称
EDUCATIONAL DEVICE
摘要
申请公布号
GB1365262(A)
申请公布日期
1974.08.29
申请号
GB19720027354
申请日期
1972.06.12
申请人
EPOCH CO LTD
发明人
分类号
G09B3/06;G09B3/08;(IPC1-7):G09B3/06
主分类号
G09B3/06
代理机构
代理人
主权项
地址
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