GB/T 39383-2020埋地用无压热塑性塑料管道系统弹性密封圈接头的密封性能试验方法标准
英文:Thermoplastics piping systems for underground non-pressure applications—Test method for leaktightness of elastomeric ...
英文:Thermoplastics piping systems for underground non-pressure applications—Test method for leaktightness of elastomeric ...