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发明名称
Enregistrement à son pur avec nombre de traces variables
摘要
申请公布号
FR813516(A)
申请公布日期
1937.06.03
申请号
FRD813516
申请日期
1936.11.13
申请人
KLANGFILM GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
发明人
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
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