Cooling and refrigeration systems, parts and components thereof and controls therefor, heating and ventilating systems, parts and components thereof and controls therefor, hot water systems, parts and components thereof and controls therefor, electrical industrial controls and components thereof, electrical switch gear; drying agents to absorb moisture in refrigeration systems, zeolites, chlorinated hydrocarbons, solder, indicator papers; oil and special pure oils on mineral and paraffin basis; welding sockets, clamps, brackets, containers for dissolving agents, apparatus for interruption of fuel, cooper tubing, flexible metal tubes, distribution tubes, cable joints, nuts, container cans of iron and other non-precious metals, containers for gas under high pressure, containers for carbon dioxide, containers for refrigerants, tubes for central heating, expansion tubes of metal, bellows and corrugated tubes, diaphragm type expansion members, tube and pipe fittings, springs, metal castings, mufflers of metal, metal couplings for tubes, valves and valve housings, and parts therefor, solder containing silver and silver-tin-alloy; electric motor driven pumps, steam boiler systems and components thereof; interrupter release valves for machines, pumps for motors, steam pumps, electrical motors, electrical generators, filters as parts of motors, oil filters as parts of lubrication systems or for lubrication systems, feed water controls, compressors, shunt and bypass valves, oil pumps, pressure reduction valves, pressure equalizing valves, heat exchangers, stuffing boxes, air filters and air dryers; flare tools for tubes, leakage detectors, manometers, automatic switches, electric switches, distant operated electric switches, automatic controls for industrial processes, automatic temperature controls, automatic pressure controls, automatic level controls, thermoelectric elements, flame controls, temperature operated servo mechanisms, photo resistors, photo cells, pressure gauges, liquid level controls, device for regulating electric current for motors, semi-conductors, electrical contacts, electrical control devices, electrical timers, electrical rectifiers, electrical coils, electrical transformers, electrical electrodes, electrically operated valves, solenoid operated valves, alarms (whistles) for filling of containers, amplifiers, hygrometers, hygrostats, capillary tubes, spark transformers, ignition transformers, diaphragms for technical and scientific purposes, control devices for pumps, temperature sensing elements, light and flame sensing elements, thermostats for flat irons, current limiters, room temperature controls, switches, switch gears, solenoid operated switches, connectors, resistance thermometers, draft temperature controls, control watches; pumps for oil burners, valves for burner pumps, oil filters for burners, strainers, shut-off valves, photo electrical controls for burners, draft controls, electric water heater thermostats, district heating systems and parts therefot, thermostatic valves, pressure operated valves, differential pressure operated valves, steam heating systems and parts therefor, room thermostats for heating purposes, electric and room thermostats, valves for hot water and steam heating, automatic level control for steam boilers, fitting for oil burners and heating installations, dial thermometers, manual shut-off valves, solenoid valves therefor, thermostats for ranges, ventilation systems and parts and controls therefore, milk coolers, water coolers, bottle coolers, ice makers, refrigerators, deep freezers, refrigerated system for dehumidifying, air heaters, ship cooling plants and parts therefor, controls for furnaces, kilns and boilers, valves for heat exchangers, mixing valves for showers and bath tubs, faucets, spouts, receivers for refrigeration plants, fan limit controls, security and regulation controls for gas apparatus and supply, security and regulation controls for water supply, water softeners, washing machines and parts and controls therefor, thermostats, electric switches, solenoid operated switches, program switches, gas regulators (pressure), gas ignition devices, temperature and pressure operated furnace feed water controls, installations for refrigerating refrigerators, air conditioners, compressors, hermetically sealed compressors for refrigeration, commercial and residential refrigeration systems, condensing units and mountings therefor, expansion valves, automatic pressure valves, suction valves, strainers, filters, dryers, level controls for evaporators, oil separators, temperature controls, thermostats for refrigeration, defrost cycle control equipment and controls, air conditioners, lamp sockets, dehumidifiers, thermostats for refrigeration plants, refrigerant, heat exchangers for refrigeration plants, liquid indicators for refrigeration plants, changing boards for refrigeration systems and parts therefor, suction strainers, valves for refrigeration plants, diaphragm valves, bellow valves, shutoff valves, automatic water valves for refrigeration plants, thermostats, room thermostats, differential pressure controls for refrigeration plants, solenoid valves for refrigeration plants, refrigerant distributors, liquid level controls for evaporators, pumps, liquid level controls, pressure controls, strainers, oil burners, gas burners, electrodes, flame controls, ignition systems, nozzles, oil pumps, pressure regulators, complete gas control unit for furnaces, safety valves, thermoelectric operated valves, thermoelements therefore, gas pressure relief cut-off silent solenoid valves, boiler thermostats and safety thermostats, circulation pumps for water heating systems, temperature controls for bath tubs and showers, mixing valves for hot and cold water, controls for ovens, lighting devices for refrigerators, mountings for protection and regulation of gas supply, hot water, steam or forced air heating installations and parts therefor, controls for electric heating, controls for electric household appliances; air filters, oil filters, combined filters and dryers, dryers, furnaces, pumps, nozzles and valves, controls and safety cut-out controls for gas installations and appliances; ranges and furnaces; flow dividers, distributor valves; electric clocks, time clocks and timers; putty, joint paste and parts for the aforesaid devices, made of plastic, bakelite, thermoplastic and setting compounds; electronic controlled automatics for refrigeration plants, and accessories for inverters and motor controls, flow controls, oxygen meters, meters for controlling dissolved oxygen (in fluid) and accessories, therefor, especially floats therefor, electronic thermostats, indoor-and-outdoor controls, day-and-night controls, proportional valves, variable pumps, compressors for heat pumps, temperature transmitters, pressure transmitters.