Non-Destructive Testing (NDT) Market Size, Share & COVID-19 Impact Analysis, By Offering (Equipment and Service (Inspection Service, Training Service, Calibration Service, and Equipment Rental Service), By Method (Visual Inspection, Surface Inspection, Volumetric Inspection), By Technique (Ultrasonic Testing, Visual Inspection Testing, Magnetic Particle Testing, Liquid Penetrant Testing, Eddy-Current Testing, Radiographic Testing, Acoustic Emission Testing), By Vertical (Manufacturing, Oil & Gas, Aerospace, Public Infrastructure, Automotive, Power Generation), and Regional Forecast, 2023-2030