Pressure gauges; Radiation gauges used for measuring the physical properties of materials; Tension testers; Testers for axle clearance; Antifreeze testers; Battery testers; Brake fluid testers; Circuit testers; Depth gauges; Diesel injector testers; Diesel oil emission testers; Ductility testers; Electrical outlet tester; Electronic and optical communications instruments and components, namely, communication link testers for testing communication links; Electronic ultrasonic test equipment, n...