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发明名称
Improvements in and relating to correcting magnetic compasses
摘要
申请公布号
GB624234(A)
申请公布日期
1949.05.31
申请号
GB19470016055
申请日期
1947.06.18
申请人
JOHN SYDNEY RAYNES;GILBERT NATHANIEL HARVEY;HENRY LUXMOORE HITCHINS
发明人
分类号
G01C17/38
主分类号
G01C17/38
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代理人
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