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经营范围
发明名称
Improvements in or relating to Educational Testing Apparatus.
摘要
申请公布号
GB1195092(A)
申请公布日期
1970.06.17
申请号
GB19670027323
申请日期
1967.06.13
申请人
GENERAL PRECISION INC.
发明人
分类号
G09B7/06
主分类号
G09B7/06
代理机构
代理人
主权项
地址
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