District cooling pipes - Bonded single pipe systems for directly buried cold water networks - Part 1: Factory made pipe assembly 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1部分:钢或塑料服务管、聚氨酯隔热和聚乙烯套管的工厂制管道组件