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经营范围
发明名称
Improvements in or relating to navigation instruments
摘要
申请公布号
GB346487(A)
申请公布日期
1931.04.16
申请号
GB19300002767
申请日期
1930.01.27
申请人
VERE STAINER WALLACE SMYTH
发明人
分类号
G01C21/20
主分类号
G01C21/20
代理机构
代理人
主权项
地址
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