Keywords:
Dimensions, Material thickness, Materials, Materials testing, Measurement, Measuring accuracy, Measuring instruments, Measuring techniques, Metallic materials, Metrology, Non-destructive testing, Non-metals, Permissibility, Precision, Pre-treatment of surfaces, Probe, Specification (approval), Testing, Thickness, Thickness measurement, Ultrasonic devices, Ultrasonic testing, Ultrasonics, Wall thicknesses