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发明名称
Prestressed girder
摘要
申请公布号
US3010257(A)
申请公布日期
1961.11.28
申请号
US19600023540
申请日期
1960.04.20
申请人
NAILLON JACOB D
发明人
NAILLON JACOB D.
分类号
E01D2/02;E04C3/04;E04C3/10
主分类号
E01D2/02
代理机构
代理人
主权项
地址
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