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发明名称
Audio-visual teaching material and apparatus for preparing such material
摘要
申请公布号
US3289326(A)
申请公布日期
1966.12.06
申请号
US19650478023
申请日期
1965.07.29
申请人
THE KALART COMPANY INC.
发明人
BENDER WERNER K.
分类号
G09B5/06
主分类号
G09B5/06
代理机构
代理人
主权项
地址
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