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发明名称
An improved process and apparatus for recording sound on film
摘要
申请公布号
GB505011(A)
申请公布日期
1939.05.02
申请号
GB19370023995
申请日期
1937.09.02
申请人
KARL HERMANN FRANZ SCHLEGEL
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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