GB/T 26255-2022燃气用聚乙烯(PE)管道系统的钢塑转换管件标准
英文标题:Steel-plastic-transition fittings for polyethylene(PE) piping systems for the supply of gaseous fuels GB/T 26255-20...
英文标题:Steel-plastic-transition fittings for polyethylene(PE) piping systems for the supply of gaseous fuels GB/T 26255-20...