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发明名称
Improvements in and relating to devices for producing changing picture-surfaces
摘要
申请公布号
GB335920(A)
申请公布日期
1930.10.01
申请号
GB19290009568
申请日期
1929.03.25
申请人
BERNHARD HOETGER
发明人
分类号
G09F11/02
主分类号
G09F11/02
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