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经营范围
发明名称
Procédé et dispositif de préparation ou de traitement magnétique
摘要
申请公布号
FR841966(A)
申请公布日期
1939.06.02
申请号
FRD841966
申请日期
1938.08.10
申请人
发明人
GRANIGG BARTEL
分类号
H01F7/20
主分类号
H01F7/20
代理机构
代理人
主权项
地址
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