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发明名称
Appareil perfectionné pour l'essai d'un support magnétique d'enregistrement
摘要
申请公布号
FR1117435(A)
申请公布日期
1956.05.23
申请号
FRD1117435
申请日期
1954.11.23
申请人
发明人
REYNOLDS DONALD K.
分类号
G01R31/30;G11B5/64;G11B5/70;G11B20/18;G11B20/20
主分类号
G01R31/30
代理机构
代理人
主权项
地址
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