SUBMERSIBLE BATTERY PACKS, SEAWATER BATTERIES, SILVER - ZINC BATTERY CHARGERS, NICKEL - CADMIUM BATTERY CHARGERS, PORTABLE SILVER-ZINC MINE POWER SYSTEMS, MINE LUMINAIRES, PORTABLE WORK LIGHTS, AND DC/DC CONVERTERS FOR DEEP OCEAN USE

AIR TEMPERTURE SENSORS, TEMPERTURE LEVEL AND RATE OF RISE ANALYSIS SYSTEMS FOR MINES, AND OPTICAL TEST STANDS