Global Non-Destructive Testing Market Size Estimation, Share, Future Growth Trends, and COVID-19 Impact Analysis, By Technique (Ultrasonic Testing, Visual Inspection Testing, Magnetic Particle Testing, Liquid Penetrant Testing, Eddy-Current Testing), By Method (Visual Inspection, Surface Inspection), By Service ( Ultrasonic Inspection, Equipment Rental Services), By Vertical (Manufacturing, Oil & Gas, Aerospace, Public Infrastructure) and Regional Forecasts, 2022-2030