GB/T 19473.1-2020冷热水用聚丁烯(PB)管道系统第1部分:总则标准
英文:Polybutene (PB) piping systems for hot and cold water installations—Part 1: General GB/T 19473.1-2020介绍: 国家标准《冷热水用聚丁烯...
英文:Polybutene (PB) piping systems for hot and cold water installations—Part 1: General GB/T 19473.1-2020介绍: 国家标准《冷热水用聚丁烯...