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发明名称
Open web metal joist
摘要
申请公布号
US2860743(A)
申请公布日期
1958.11.18
申请号
US19550485475
申请日期
1955.02.01
申请人
WILLIAM CLIFF
发明人
CLIFF WILLIAM
分类号
E04C3/04;E04C3/08
主分类号
E04C3/04
代理机构
代理人
主权项
地址
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