Elastomeric seals; materials requirements for pipe joint seals used in drainage and sewerage applications; part 4: cast polyurethane sealing elements
国外标准现行
标准号:PREN 681-4-1992
标准名称: 弹性密封剂.排水管和污水管接头密封剂的材料要求.第4部分:铸制聚氨酯密封元件
英文名称:Elastomeric seals; materials requirements for pipe joint seals used in drainage and sewerage applications; part 4: cast polyurethane sealing elements