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经营范围
发明名称
Teaching machine
摘要
申请公布号
GB1135562(A)
申请公布日期
1968.12.04
申请号
GB19650011283
申请日期
1965.03.17
申请人
CHARLES STANLEY BLAKE
发明人
分类号
G09B3/04
主分类号
G09B3/04
代理机构
代理人
主权项
地址
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