Anodize - To cover a metal with a layer of oxide by using an electric current, Apparatus - A set of equipment or tools or a machine that is used for a particular purpose:, Boiler - The part of a steam engine where water is heated to provide power, Forge - A working area with a fire for heating metal until it is soft enough to be beaten into different shapes, Galvanize - Coat (iron or steel) with a protective layer of zinc., Hydraulic - Operated, moved, or effected by means of water, Manipulate - To treat or operate with or as if with the hands or by mechanical means especially in a skillful manner, Temper - Improve the hardness and elasticity of (steel or other metal) by reheating and then cooling it., Thermodynamics - The study of the relations between heat, work, temperature, and energy., Turbine - An engine that turns fluid movement into energy,

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