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摘要
申请公布号
US1851046(A)
申请公布日期
1932.03.29
申请号
US19300432465
申请日期
1930.03.01
申请人
JOSEPH HORNI
发明人
HORNI JOSEPH
分类号
G09F7/20
主分类号
G09F7/20
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