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发明名称
Building construction
摘要
申请公布号
US1925417(A)
申请公布日期
1933.09.05
申请号
US19320607769
申请日期
1932.04.27
申请人
RAYMOND M. CALKINS
发明人
SWANK JAMES W.
分类号
E04C2/08
主分类号
E04C2/08
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代理人
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