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经营范围
发明名称
Improvements in or connected with magnetic compasses
摘要
申请公布号
GB424285(A)
申请公布日期
1935.02.19
申请号
GB19330023164
申请日期
1933.08.19
申请人
NORMAN CHARLES BAIRD;JAMES STUART
发明人
分类号
G01C17/00
主分类号
G01C17/00
代理机构
代理人
主权项
地址
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