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发明名称
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摘要
申请公布号
US1752640(A)
申请公布日期
1930.04.01
申请号
US19280283854
申请日期
1928.06.08
申请人
OSCAR KARLSLYST
发明人
KARLSLYST OSCAR
分类号
E06B9/52
主分类号
E06B9/52
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