When the gasoline and a car engine burns up to seventy percent of the energy generated converts into heat a lot of this heat gees out the exhaust system but much of it stays heating up the engine the cars cooling system prevents overheating the systems key component is the radiator a water and antifreeze mix absorbs the heat generated by the engine the fluid then flows through the radiators tubes to cool down the tubes are made from paper thin brass rollers been the four centimeter wide strip into the shape of a flat tube the tubing then runs through of that of bubbling hot molten lead as the tubing exit for that it runs through cold water hardens the LED coding a cutter then chops the tubing into pieces the length of which varies according to the model of radiator these are about 76 centimeters buy meanwhile another machine shapes and narrow strip of copper just one and