Acid hydrometers; Alidades; Amplifiers; Batteries; Battery jars; Cameras; Cell phones; Chargers for batteries; Connections for electric lines; Covers for electric outlets; Earphones; Frequency meters; Gas meters; Gasoline gauges; Holders for electric coils; Junction sleeves for electric cables; Keyboards; Lactodensimeters; Lenses for astrophotography; Loud speakers; Measuring spoons; Metronomes; Microscopes; MP3 players; Optical apparatus and instruments, namely, optical ports for underwater ...