GB/T 19473.2-2020冷热水用聚丁烯(PB)管道系统第2部分:管材标准
英文:Polybutene (PB) piping systems for hot and cold water installations—Part 2: Pipes GB/T 19473.2-2020介绍: 国家标准《冷热水用聚丁烯(P...
英文:Polybutene (PB) piping systems for hot and cold water installations—Part 2: Pipes GB/T 19473.2-2020介绍: 国家标准《冷热水用聚丁烯(P...