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发明名称
DIDACTIC DEVICE
摘要
申请公布号
GB1596684(A)
申请公布日期
1981.08.26
申请号
GB19780001056
申请日期
1978.01.11
申请人
YAMAMOTO T
发明人
分类号
B42D15/00;G09B1/00;G09B3/04;G09B19/00;G09B19/02;G09B19/06;G09B19/08;(IPC1-7):G09B3/02
主分类号
B42D15/00
代理机构
代理人
主权项
地址
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