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发明名称
Procédé de détermination et de contrôle d'un temps d'exposition précis dans les enregistrements sonores photographiques, en particulier dans le procédé d'enregistrement par demi-ondes
摘要
申请公布号
FR894594(A)
申请公布日期
1944.12.28
申请号
FRD894594
申请日期
1943.05.11
申请人
UNIVERSUM-FILM AKTIENGESELLSCHAFT
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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