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发明名称
Precast concrete beam
摘要
申请公布号
US2962839(A)
申请公布日期
1960.12.06
申请号
US19560611225
申请日期
1956.09.21
申请人
CALUMET FLEXICORE CORPORATION
发明人
CARLSON CARL R.
分类号
E04B5/06
主分类号
E04B5/06
代理机构
代理人
主权项
地址
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