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发明名称
Method of making prestressed concrete beams
摘要
申请公布号
US3233027(A)
申请公布日期
1966.02.01
申请号
US19610162542
申请日期
1961.12.27
申请人
ELOF WENNSTROM
发明人
WENNSTROM ELOF
分类号
B28B23/04
主分类号
B28B23/04
代理机构
代理人
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