FOOD, BEVERAGE, AND CHEMICAL PROCESSING EQUIPMENT-NAMELY, CARBON DIOXIDE GENERATING AND PURIFYING APPARATUS; [ NITROGEN ] GENERATING PLANTS; [ HYDROGEN GENERATING PLANTS; ] INERT GAS GENERATORS; GAS PURIFICATION AND RECOVERY APPARATUS; EXOTHERMIC AND ENDOTHERMIC GAS GENERATORS; HOP SEPARATORS; BEVERAGE CARBONATORS; AND CARBON DIOXIDE COMPRESSORS