9 inspection, testing, and measuring devices, namely, pipe length measuring apparatus, and magnetic flux inspection equipment in the nature of magnetometers; electro-magnetic inspection equipment, namely, electromagnetic apparatus used to generate or measure magnetic fields; piping grade testing devices, namely, apparatus for testing solids, metal strength testing machines, surface roughness testing machines and instruments, and ultrasound inspection devices for non-medical, non-destructive testing; software for use in the operation and control of inspection, testing, and measuring devices