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cc
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Cubic Centimeters - a standard measure of volume.
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cfm
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Cubic Feet per Minute - in the case of blowers, a measurement of the volume of air moved by the tool. Higher means more air.
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chain brake
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For chain saws, a safety feature which stops the chain in certain circumstances.
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coupling
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Something that joins or connects two things.
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diaphragm carburetor
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A type of carburetor designed not to rely upon gravity, allowing an engine to operate in any position - such as upside down.
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displacement
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The volume of fuel displaced byone stroke of a piston within the cylinder of an internal combustion engine - important as a gauge of the power of the engine although many factors affect the power and efficiency of the tool as a whole.
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dry weight
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Weight without fuel or other fluids.
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fps
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Feet Per Second. A measurement of unidirectional speed.
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purge pump
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A device to remove excess fuel from the carburetor.
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reciprocate
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To move back and forth.
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reduction ratio
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A indication of a mechanical advantage. A higher number will result in greater torque.
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splined
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Having projections on a shaft that fit into slots on a corresponding shaft, enabling both to rotate together.
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torque
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A turning or twisting force.
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