cast iron sewage pipe
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无承口铸铁污水管 HUBLESS CAST IRON SOIL PIPES
·2,447,543篇论文数据，部分数据来源于NoteExpress
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。
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.
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