21. NX41802, Navy XLNE-1 # 31505, was returned to Pratt-Read were it underwent destructive testing and was destroyed. 22. World War II saw the dramatic use of x-rays in industry for non-destructive testing of war materials. 23. Terahertz radiation, or " T-Rays " have many potential applications for 3D scanning, non-destructive testing , and spectroscopy. 24. ATILA is used in many applications including underwater acoustic, seismic, non destructive testing , medical imaging, RF telecommunications. 25. This principle can be used also for non-contact "'infrared non-destructive testing ( IRNDT ) of materials " '. 26. With modern video equipment the interior of the pipe may be inspected-this is a form of non-destructive testing . 27. The Oklahoma Technology Counsel profiled Veracity's non-destructive inspection ( NDI ) / non-destructive testing ( NDT ) solutions. 28. "We'll save tens of millions just by eliminating destructive testing , " said James Farago, Delphi's supervisor of controls engineering. 29. Past internal inspection methods would require using a 2D X-ray of the component or the use of destructive testing . 30. The application of acoustic emission to non-destructive testing of materials, typically takes place between 100 kHz and 1 MHz.