Plastics piping systems - Mechanical joints between fittings and pressure pipes - Test method for leaktightness under internal pressure of assemblies subjected to bending (ISO 3503:2015); German and English version EN ISO 3503:2015
塑料管道系统.配件和压力管道之间的机械接头.弯曲组件在内部压力下的密封性试验方法(ISO 3503-2015);德语和英语版本EN ISO 3503:2015