CRYOGENIC AND NON-CRYOGENIC AIR SEPARATORS FOR SEPARATION OF ATMOSPHERIC GASES FROM THE AIR; HEAT EXCHANGERS FOR LIQUEFYING OR VAPORIZING GASES, LIQUIDS AND SOLIDS; CHEMICAL PURIFIERS, PARTICLE FILTERS AND DRIERS FOR GASES AND LIQUIDS; INJECTORS FOR MIXING GASES AND LIQUIDS; VACUUM FURNACES; FILTERS FOR GAS PRESSURE REGULATORS AND PIPELINES; CRYOGENIC FOOD PROCESSING SYSTEMS; NAMELY, FREEZING TUNNELS, SPIROLATOR FREEZERS, EXPANSION TURBINES, COMPRESSORS, INTERCOOLERS, MAIN HEADERS AND INSULATED ROOMS; CARBON DIOXIDE DISPENSING SYSTEMS FOR CHILLING OF FOODS; NAMELY, LIQUID CARBON DIOXIDE STORAGE UNITS, LIQUID CARBON DIOXIDE PIPING, SNOW HORNS, EVACUATION UNITS FOR REMOVAL OF CARBON DIOXIDE VAPOR AND AUTOMATIC SOLID STATE CONTROLS, ALL FOR USE WITH COVERED OR OPEN BLENDERS; INDUSTRIAL FREEZE DRYERS; AND OXYGENATION UNITS FOR THE TREATMENT AND PURIFICATION OF WATER