[ rotary converters, phase modifiers, ozone generators, electric cells, arc welding apparatuses, and ] electric arc cutting machine; measuring apparatus and devices, namely, measuring devices with gradations in standard measuring units, namely, thermometers, gas meters, temperature meters, water meters, balances and scales, tape measures, planimeters, graduated rulers, and dynamometers; measuring devices with gradations in derived measuring units, namely, pressure meters, level gauges, acoust...