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发明名称
Substances magnétiques
摘要
申请公布号
FR780020(A)
申请公布日期
1935.04.17
申请号
FRD780020
申请日期
1934.08.17
申请人
LIGNES TELEGRAPHIQUES ET TELEPHONIQUES
发明人
分类号
H01F1/16
主分类号
H01F1/16
代理机构
代理人
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地址
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