GB/T 26255.1-2010

Mechanical fittings for polyethylene piping systems for the supply of gaseous fuels - Part 1:Metal fittings for pipes of nominal outside diameter less than or equal to 63mm

燃气用聚乙烯管道系统的机械管件 第1部分：公称外径不大于63mm的管材用钢塑转换管件