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发明名称
Lintel structure
摘要
A lintel fabricated of an elongated lightweight metal plate having rigidifying beam means affixed thereto and extending longitudinally thereof.
申请公布号
US4020612(A)
申请公布日期
1977.05.03
申请号
US19740516765
申请日期
1974.10.21
申请人
SMITH PIPE AND STEEL CO.
发明人
WELCH, WILLIAM T.
分类号
E04C3/02;(IPC1-7):E04C3/30;E04B1/16
主分类号
E04C3/02
代理机构
代理人
主权项
地址
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