发明名称 COMPOSITE UNDERGROUND PIPE STRUCTURE
摘要 <p>A composite pipe structure including a pair of structural polymer layers disposed on opposed sides of a central metal layer. In a preferred embodiment, the thickness of the composite structure is comprised of approximately 40%-60% of the metal layer, with the remaining balance comprised of the pair of polymer layers.</p>
申请公布号 CA2883835(A1) 申请公布日期 2015.09.04
申请号 CA20152883835 申请日期 2015.03.03
申请人 W.E. HALL COMPANY, INC. 发明人 TWIST, JORDAN
分类号 F16L9/147;B32B1/08;B32B15/08;B32B37/02;F16L58/10 主分类号 F16L9/147
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