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发明名称
Device for determining the existence or the direction of a magnetic field
摘要
申请公布号
GB451850(A)
申请公布日期
1936.08.10
申请号
GB19350000695
申请日期
1935.01.08
申请人
ETTORE CARETTA
发明人
分类号
G01C17/28
主分类号
G01C17/28
代理机构
代理人
主权项
地址
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