The two special cement coatings are applicable to sewage pipeline internal corrosion for ductile iron pipe, improve the ability to resist the erosion of acid components in sewage.
这两种特殊水泥涂层均适用于污水管道用球墨铸铁管的内防腐，提高抵抗污水中酸碱成分的侵蚀能力。
2
The most common way to restore the sand lost to erosion is to pipe it from the ocean floor back up to the beach.
储存沙最常见的方法就是用管子把它从海底重新运回海岸。
3
The erosion-abrasion, which is one of the main reasons of the leakage of the power-station boiler-conduit-pipe 'contra-flow heating-surface, accounts for 75% or more of the accidents of the boiler.