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经营范围
发明名称
Bildtonfilm
摘要
申请公布号
DE650582(C)
申请公布日期
1937.09.25
申请号
DE1932D064878D
申请日期
1932.12.14
申请人
WALTER DITSCHE
发明人
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
主权项
地址
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