INSTALLATION, MAINTENANCE, AND REPAIR OF DAIRY AND INDUSTRIAL EQUIPMENT-NAMELY, CENTRIFUGAL CREAM SEPARATORS, CENTRIFUGAL MILK CLARIFIERS, ELECTRIC WATER HEATERS, PLATE HEAT EXCHANGERS, MILKING MACHINES, MILK CAN HOISTS, MILK COOLERS, MILK PUMPS, VACUUM PUMPS, FOOD FREEZERS, WASH VATS, JNDUSTRIAL CENTRIFUGES, AND MIXERS AND PROPORTIONING PUMPS USED IN CONJUNCTION WITH INDUSTRIAL CENTRIFUGES