DIN EN 14982-2011 塑料管路和管道系统.检查室和检修孔用热塑性塑料轴或升口.环钢度的测定;德文版本EN 14982-2006+A1-2010
Plastics piping and ducting systems - Thermoplastics shafts or risers for inspection chambers and manholes - Determination of ring stiffness; German version EN 14982:2006+A1:2010