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发明名称
PRESTRESSED STEEL JOIST
摘要
申请公布号
GB9109254(D0)
申请公布日期
1991.06.19
申请号
GB19910009254
申请日期
1991.04.30
申请人
CARNALL, MARK
发明人
分类号
E04C3/04;E04C3/10
主分类号
E04C3/04
代理机构
代理人
主权项
地址
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