BIG

measuring appliances and instruments, namely precision measurers in the nature of angle gauges, angle dividers, spherometers, inclinometers, interferometers, straightness testers, projectors, graduation calibration checkers, length gauges, thread measures, comparators, surface roughness testers, flatness testers; material testers in the nature of metal compression testers and metal strength testers; and surveyors in the nature of covering alidades, base plates, distance measure/range finders, clinometers, tripods, magnetic compasses, compass needles, gyrocompasses, gyromagnetic compasses photogrammetric instruments and levels (spirit levels)