Amplifiers; Capacitors; Distance measuring apparatus; Electrical distribution boxes; Electrical transducer; Electronic detectors for observing and measuring the infrared spectrum, namely, infrared detectors; Fuse wire; High frequency switches; Instruments for measuring length; Light emitting diodes (LEDs); Magnifying glasses; Oculars; Oscillographs; Photographic viewfinders; Pressure measuring apparatus; Printed circuit boards; Stands for photographic apparatus; Voltage stabilizers; Voltage s...