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发明名称
Bande sans fin à sillon hélicoïdal pour enregistrements magnétiques
摘要
申请公布号
FR1105337(A)
申请公布日期
1955.11.29
申请号
FRD1105337
申请日期
1954.05.26
申请人
发明人
VACHER JULIEN
分类号
G11B5/004
主分类号
G11B5/004
代理机构
代理人
主权项
地址
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