Defects in welding: https://www.nde-ed.org/NDETechniques/Radiography/TechCalibrations/RadiographInterp.xhtml Courtesy of pictures: 1. QC INSPECTOR https://www.youtube.com/channel/UCD3rM5NU9pB6oDcT3YXOpIw https://www.youtube.com/watch?v=sUiSGjVj7HY&ab_channel=QCINSPECTOR https://www.youtube.com/watch?v=Wks5oKHwvmc&ab_channel=QCINSPECTOR 2. Material Welding- Online Welding and NDT Training https://www.youtube.com/watch?v=9epp7uBwxBA&ab_channel=MaterialWelding-OnlineWeldingandNDTTraining 3. NATIONAL NDT SERVICES VISAKHAPATNAM, INDIA https://www.youtube.com/watch?v=ukW5mnCVtJU&ab_channel=NATIONALNDTSERVICESVISAKHAPATNAM%2CINDIA 4. Modenas dinamik https://www.youtube.com/watch?v=xXEjxv_TUeU&t=355s&ab_channel=RSAChannel 5. Welding /NDT Inspection https://www.youtube.com/watch?v=YkOKNoI18AU&t=587s&ab_channel=Welding%2FNDTInspection 6. Lokitechentertainment https://www.youtube.com/watch?v=1IIhSGgSD3A