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发明名称
DYNAMIC DEMONSTRATION DEVICES FOR VISUALLY DEMONSTRATING SCIENTIFIC CONCEPTS
摘要
申请公布号
IL40659(A)
申请公布日期
1973.01.30
申请号
IL19670040659
申请日期
1967.11.16
申请人
MOSCOVICH I
发明人
分类号
G09B23/12;(IPC1-7):G09B23/12
主分类号
G09B23/12
代理机构
代理人
主权项
地址
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