GB/T 26255.2-2010

Mechanical fittings for polyethylene piping systems for the supply of gaseous fuels - Part 2: Metal fittings for pipes of nominal outside diameter greaten than 63mm

燃气用聚乙烯管道系统的机械管件 第2部分：公称外径大于63mm的管材用钢塑转换管件