31 MECHANICAL REFRIGERATION APPARATUS AND PARTS THEREOF-NAMELY, COMPRESSORS AND CONDENSING UNITS; ICE MAKERS FOR BULB AND CUBE ICE; REFRIGERATED DISPLAY CASES; WATER COOLERS; BEVERAGE COOLERS; FORCED AIR COOLERS FOR PRESERVATIVE PURPOSES; MILK COOLERS; WALK-IN COOLERS FOR STORAGE OF FOODS AND BEVERAGES; FOOD FREEZERS AND COOLING TOWERS