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发明名称
Teaching aid
摘要
申请公布号
GB2069218(A)
申请公布日期
1981.08.19
申请号
GB19800004755
申请日期
1980.02.13
申请人
CARRETT M W;FOX C R
发明人
分类号
A63F3/04;A63F9/18;G09B1/04;G09B1/16;G09B17/00;G09B19/12;(IPC1-7):G09B1/04;A63F1/02;A63F3/06;A63F9/20
主分类号
A63F3/04
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