Aerometers; Altimeters; Ammeters; Anemometers; Barometers; Betatrons; Dynamometers; Galvanometers; Hygrometers; Manometers; Modems; Ohmmeters; Oscillographs; Pyrometers; Radios; Seismographs; Sonar; Switchboards; Telemeters; Videophones; Voltmeters; Air quality measurement apparatus, namely, particle counters; Astronomical spectrographs; Automatic telephone exchanges; Blank USB flash drives; Burglar alarms; Car navigation computers; Carbon dioxide detectors; Cards and microprocessors for comp...