9 Electronically operated valves; analogue and digital aircraft cockpit instrumentation, namely, fuel management and monitoring gauges and instruments, namely, fuel probes and sensors and fuel indicators to measure the amount of remaining fuel; fuel flow gauges for measuring the flow of fuel, level sensors and controllers for the distribution of fuel; contents gauges to indicate the amount of fuel remaining; flight data recorders; wind gauges; differential pressure transmitters for measurement purposes; cryogenic turbine meters; flow meters; electronic sensors, namely, accelerometers, pressure transducers and signal conditioners; sound amplifiers; electrical, pneumatic and hydraulic flow valve controllers; electrically operated valves; aircraft engine fire and overheat detectors; aircraft cargo bay and electronic bay smoke detectors; micro electronic sensors for pressure and acceleration and light emitting diode displays; solid state electronic cockpit displays for aircraft; navigation apparatus and instruments, namely, compasses; flight control apparatus and instruments, namely, engine displays and systems, flight displays, navigation displays and autopilot systems; auto pilot; sensors namely accelerometers, pressure transducers, temperature sensors, signal conditioners, angular and linear position sensors and amplifiers; engine monitors, namely, instruments which provide information relating to engine conditions of flame, pressure, temperature, torque, oil and debris; electronic scoring equipment, which assesses accuracy of hits on free flying and towed targets; surveillance cameras for unmanned air vehicles over battlefields; Doppler radar for electronic scoring systems which assess the accuracy of bits on free flying and towed targets and acoustic apparatus, namely, high sensitivity microphones and ultrasonic microphones, electrical cables namely high performance and low noise microwave and radio frequency transmission lines; infra red sensors and fuel sensors; vibration sensors; monitors, namely, instruments for turbines, rotors, jet engines and propellers which measure shock vibration and pressure