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发明名称
Projector comprising automatic picture changing means
摘要
申请公布号
US1901819(A)
申请公布日期
1933.03.14
申请号
US19320633667
申请日期
1932.09.17
申请人
ALFRED OSCHWALD
发明人
OSCHWALD ALFRED
分类号
G03B23/04
主分类号
G03B23/04
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