Plastics piping systems for hot and cold water installations - Polyethylene of raised temperature resistance (PE-RT) - Part 5: Fitness for purpose of the system - Amendment 1 (ISO 22391-5:2009/Amd 1:2020, Corrected version 2021-03)
冷热水装置用塑料管道系统耐高温聚乙烯(PE-RT)第5部分:系统适用性修改件1