DANSK DS/EN ISO 20769-2:2018 無(wú)損檢測(cè) 通過(guò) X 射線和伽馬射線對(duì)管道中的腐蝕和沉積物進(jìn)行射線照相檢查 第2部分:雙壁射線照相檢查 (ISO 20769-2:2018)
Non-destructive testing – Radiographic inspection of corrosion and deposits in pipes by X- and gamma rays – Part 2: Double wall radiographic inspection (ISO 20769-2:2018)