| Mechanical Definitions
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                | Feeder Conveyor : It is a conveyor which is short and 
                  designed to transport materials to another conveyor. It is often 
                  called Stage Loader.
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                | Feed Pipe : It is a pipe that conducts water to a boiler 
                  drum.
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                | Feed Reel : It is a reel from which paper tape or magnetic 
                  tape is being fed.
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                | Feed Trough : It is a container or device into which 
                  feed water overflows from a boiler drum.
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                | Ferrometer : It is a device which is used to make permeability 
                  and hysteresis tests of iron and steel.
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                | Field-strength Mater : It is a standardized radio receiver 
                  which is used to measure the field strength of radiated electromagnetic 
                  energy from a radio transmitter.
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                | Fill Factor : It is an approximate load that the dipper 
                  of a shovelis carrying, expressed as a percentage of the rated 
                  capacity.
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                | Filter : It is a porous article or material for separating 
                  suspended particulate matter from liquids by passing the liquid 
                  through the pores in the filter and sieving out the solids.
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                | Filter Photometer : It is a colorimeter in which the 
                  length of light is selected by the use of appropriate glass 
                  filters.
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                | Filter Pump : It is an aspirator or vacuum pump that 
                  creates a negative pressure on the filterate side of the filter 
                  to hasten the process of filtering.
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                | Fineness Modulus : It is a number which describes the 
                  fitness of a fine aggregate or other fine material. Fineness 
                  modulus is a measurement of the fineness of a given aggregate.
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                | Finned Surface : It is a tabular heatexchange surface 
                  which has extended projections on one side.
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                | Firebox : The area where the fuel is burned, producing 
                  heat to boil the water in the boiler. It is a furnace of a locomotive 
                  or similar type of fire tube boiler.
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