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经营范围
发明名称
A device for measuring ground speeds or distances in connection with aircraft
摘要
申请公布号
GB489514(A)
申请公布日期
1938.07.28
申请号
GB19370005982
申请日期
1937.02.27
申请人
GEORGE HERBERT DOWTY
发明人
分类号
G01C22/00
主分类号
G01C22/00
代理机构
代理人
主权项
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