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         Air filter: device that removes 
          suspended particles from a liquid or gas. 
          Nut: metal part used to close the cover of the air filter. 
          Cover: metal part protecting the air filter. 
          PVC filter: vinyl filter. 
          Vacuum hose: tubes used to expel air. 
          Vacuum control: device that regulates pressure. 
          Shutter: jointed flap that regulates air intake. 
          Air intake: place where air enters to be filtered. 
          Heater pipe: hose that uses the heat of the motor to warm air 
          that enters the filter. 
          Collar: adjustable metal circle that can be tightened to hold 
          a hose in place. 
          Thermostatic valve: valve used to maintain a constant temperature. 
          Air filter: apparatus through which air is passed to remove impurities. 
          Clamp: collar that holds the cover in place. 
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