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发明名称
Structural member
摘要
申请公布号
US2250253(A)
申请公布日期
1941.07.22
申请号
US19390264997
申请日期
1939.03.30
申请人
GREAT LAKES STEEL CORPORATION
发明人
BOWEN JOHN E.
分类号
E04C3/04;E04C3/09
主分类号
E04C3/04
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