GB/T 33488.4-2017化工用塑料焊接制承压设备检验方法第4部分:超声检测国家标准
英文:Test method of pressure equipments of thermoplastics welded for chemicals—Part 4:Ultrasonic examination GB/T 33488.4-...
英文:Test method of pressure equipments of thermoplastics welded for chemicals—Part 4:Ultrasonic examination GB/T 33488.4-...