34 HEAT EXCHANGERS FOR TRANSFERRING HEAT BETWEEN ANY TWO FLUIDS SUCH AS GASES, VAPORS OR LIQUIDS AND COMBINATIONS THEREOF, FOR EXAMPLE COOLERS FOR MILK, JUICES, DIESEL JACKET WATER, LUBRICATING OIL, HYDRAULIC FLUID, PLATING BATH SOLUTIONS, CUTTING OIL, QUENCHING OIL, REFRIGERANTS, FLUIDS USED IN THE FOOD AND DRUG INDUSTRIES, HEATERS FOR FRESH AND SALT WATER, FUELS, OILS, VEGETABLE AND FRUIT JUICES AND CHEMICAL SOLUTIONS