GB/T 39379-2020无压热塑性塑料管道系统水密性试验方法标准
英文:Thermoplastics piping systems for non-pressure applications—Test method for watertightness GB/T 39379-2020介绍: 国家标准《无压...
英文:Thermoplastics piping systems for non-pressure applications—Test method for watertightness GB/T 39379-2020介绍: 国家标准《无压...