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发明名称
Doorway construction
摘要
申请公布号
US2154641(A)
申请公布日期
1939.04.18
申请号
US19360099272
申请日期
1936.09.03
申请人
SEAMAN DAVID J
发明人
SEAMAN DAVID J.
分类号
E06B3/70
主分类号
E06B3/70
代理机构
代理人
主权项
地址
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