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发明名称
Improvements relating to directional gyroscopes
摘要
申请公布号
GB513911(A)
申请公布日期
1939.10.25
申请号
GB19380009026
申请日期
1938.03.24
申请人
ROBERT ALKAN
发明人
分类号
G01C19/00
主分类号
G01C19/00
代理机构
代理人
主权项
地址
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