发明名称 TRENCHLESS DRAINAGE STRUCTURE REPLACEMENT
摘要 Replacement drainage structures and methods for replacing drainage structures are disclosed. An example method includes driving a plurality of sections of a replacement drainage structure around a buried drainage structure to be replaced. At least a portion of the drainage structure to be replaced is positioned within the interior of a section of the replacement drainage structure. Portions of the drainage structure to be replaced are removed.
申请公布号 US2012087739(A1) 申请公布日期 2012.04.12
申请号 US201113269435 申请日期 2011.10.07
申请人 HARR ROBERT E. 发明人 HARR ROBERT E.
分类号 E03B9/00;F16L55/18 主分类号 E03B9/00
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