LACQUERING AND POWDER COATING SYSTEMS, COMPRISING ELECTROSTATIC AND COMPRESSED AIR SPRAY GUNS, LACQUER SUPPLY PUMPS, VACUUM MACHINES FOR CLEANING POWDER-COATED ITEMS AND RECOVERING EXCESS POWDER, CYCLONE SEPARATORS, FOR SEPARATING AND RECOVERING POWDER USED IN COATING, CONVEYORS FOR TRANSPORTING COATING POWDER, SIFTING MACHINES, POWDER-INJECTING MACHINES, MACHINES FOR FLUIDIZING SPRAY POWDER USING PRESSURIZED AIR, MOTORIZED STOP AND GUIDING MACHINES FOR LACQUER AND POWDER SPRAY GUNS, AUTOMATIC TRANSPORT MACHINES FOR MOVING WORK-PIECES THROUGH COATING PROCESSES, ELECTROSTATIC HIGH-VOLTAGE GENERATORS, AUTOMATIC- AND ELECTRICALLY-OPERATED VALVES FOR REGULATING PRESSURE AND THE FLOW OF FLUIDS, CONTAINERS MADE OF STEEL SHEET METAL FOR KEEPING A SUPPLY OF COATING POWDER, COUPLINGS MADE OF STEEL AND LIGHT METAL, SPRAY NOZZLES, STEERING CONTROLS FOR SUBSTRATE COATING MACHINES, ELECTRONIC CONTROLS, INSTRUMENTS FOR MEASURING THE THICKNESS OF COATINGS, SPRINKLER SYSTEMS FOR THE DISSEMINATION OF HALOGENATED HYDROCARBONS FOR FIRE PREVENTION IN COATING MACHINES, IONIZATION APPARATUS AND CHARGING ELECTRODES FOR ELECTROSTATIC CHARGING OF COATED OBJECTS, INSTRUMENTS FOR MEASURING THE CHARACTERISTICS OF OBJECTS TO BE COATED, INSTRUMENTS FOR DETERMINING THE CONTENT LEVEL OF SPRAYING MATERIALS IN COATING MACHINES, HIGH-VOLTAGE AND LOW-VOLTAGE CABLES, METERING PUMPS FOR LACQUERS, FILTERS FOR POWDER COATINGS, REPLACEABLE FILTERS, VENTILATORS AND BLOWERS FOR COATING MACHINES, HOSES AND PIPES MADE OF RUBBER OR PLASTIC FOR COATING MACHINES, WASHERS MADE OF RUBBER OR PLASTIC, AND NON-METALLIC COUPLINGS FOR COATING MACHINES ALL SOLD AS A UNIT