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发明名称
Improvements in or relating to Teaching Apparatus
摘要
申请公布号
GB1189111(A)
申请公布日期
1970.04.22
申请号
GB19660014715
申请日期
1966.04.02
申请人
JOHN HAROLD BUNTING
发明人
JOHN HAROLD BUNTING
分类号
G09B7/073;G09B7/08
主分类号
G09B7/073
代理机构
代理人
主权项
地址
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