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发明名称
Expanded structural member
摘要
申请公布号
US2010670(A)
申请公布日期
1935.08.06
申请号
US19300466614
申请日期
1930.07.09
申请人
BETHLEHEM STEEL COMPANY
发明人
KELLER ALBERT T.;SCHENCK CHARLES;FINE LEWIS
分类号
B21D47/02
主分类号
B21D47/02
代理机构
代理人
主权项
地址
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