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经营范围
发明名称
Flight trainer
摘要
申请公布号
US1944180(A)
申请公布日期
1934.01.23
申请号
US19320643058
申请日期
1932.11.17
申请人
HUFFMAN WILLIAM E
发明人
HUFFMAN WILLIAM E.
分类号
G09B9/14
主分类号
G09B9/14
代理机构
代理人
主权项
地址
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