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发明名称
Structural unit
摘要
申请公布号
US2321566(A)
申请公布日期
1943.06.15
申请号
US19390264554
申请日期
1939.03.28
申请人
WILSON WINFRED E
发明人
WILSON WINFRED E.
分类号
E04B1/32;E04B1/61
主分类号
E04B1/32
代理机构
代理人
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