Air suction machines; Gas compressors; Industrial surface treatment equipment, namely, corona treatment systems comprised of a high frequency, high voltage generator, transformers, electrodes, ozone filter and treatment station and structural parts therefor; Oxy-acetylene welding and cutting machines; Oxygen cutting devices; Compressed air machine components, namely, cylinders, valves and air grips; Parts for compressed-air machines, namely, pressure switches and sensors for monitoring, contr...