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发明名称
Method for constructing training mock-up
摘要
申请公布号
US2490690(A)
申请公布日期
1949.12.06
申请号
US19480032912
申请日期
1948.06.14
申请人
KOCH JOHN H
发明人
KOCH JOHN H.
分类号
G09B25/02
主分类号
G09B25/02
代理机构
代理人
主权项
地址
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