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发明名称
Improvements in magnets
摘要
申请公布号
GB625591(A)
申请公布日期
1949.06.30
申请号
GB19470006120
申请日期
1947.03.04
申请人
PAUL GUSTAVUS ADOLPHUS HELMUTH VOIGT
发明人
分类号
H04R9/02
主分类号
H04R9/02
代理机构
代理人
主权项
地址
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