This paper analyzes the corrosion problem of absorption and circulation sulfate tank and defects in original water supply pipe design, recommends a new water supply pipe developed by F4 material.

分析硫酸吸收循环槽加水管的腐蚀问题及加水管原设计中存在的缺陷，介绍采用F4材料研制的新加水管。

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PVC Pipe with foamed sandwich layer is a new Piping material.

芯层发泡PVC管材是一种新型管道材料。

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Square steel-pipe truss is a structure which effectively unions the mature truss manufacturing technology and the new steel-pipe material.

方钢管桁架是一种将成熟的桁架制造技术和新型的钢管材料有机结合的结构体系。

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The material then bonds to the inside of the pipe and the resin cures or hardens, creating a new pipe within the pipe and restoring the integrity of the drain or sewer.

BBC: Sewer renovation work to begin in Glastonbury