Draft Document - Elastomeric seals - Material requirements for pipe joint seals used in water and drainage applications - Part 1: Vulcanized rubber; German and English version prEN 681-1:2016
文件草案.弹性密封件.水和排水用管接头密封件的材料要求.第1部分:硫化橡胶;德语和英语版本prEN 681-1:2016