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发明名称
Portable bleacher construction
摘要
申请公布号
US1839410(A)
申请公布日期
1932.01.05
申请号
US19290354413
申请日期
1929.04.11
申请人
GEORGIANA W. POST
发明人
分类号
D06F57/00;E04H3/12
主分类号
D06F57/00
代理机构
代理人
主权项
地址
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