DIN ISO 16486-4-2016 供應氣體燃料用塑料管系統. 帶熔接連接和機械連接的未增塑聚酰胺(PA-U)管系統. 第4部分: 閥門(ISO 16486-4-2016)
Plastics piping systems for the supply of gaseous fuels - Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing - Part 4: Valves (ISO 16486-4:2016)