District cooling pipes - Bonded single pipe systems for directly buried cold water networks - Part 2: Factory made fitting assemblies of steel or plastic service pipe, polyurethane thermal insulation and a casing of polyethylene
区域冷却管.直埋冷水管网用粘结单管系统.第2部分:钢或塑料供水管、聚氨酯隔热和聚乙烯套管的工厂制配件组件