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发明名称
Dispositifs pour l'enregistrement électrique
摘要
申请公布号
FR873480(A)
申请公布日期
1942.07.09
申请号
FRD873480
申请日期
1941.05.30
申请人
LE MATERIEL TELEPHONIQUE
发明人
分类号
G11B9/00
主分类号
G11B9/00
代理机构
代理人
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