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The bore or cylinder bore is a part of a piston engine. The bore also represents the size of the diameter of the cylinder in which a piston travels. The value of a cylinder's bore, and stroke, is used to establish the displacement of an engine.[1]

The term "bore" can also be applied to the bore of a locomotive cylinder or steam engine pistons.


  1. ^ Schwaller, Anthony (1999). Motor Automotive Technology. Delmar, New York

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