Power stroke

(mechanical engineering) The stroke in an engine during which pressure is applied to the piston by expanding steam or gases.

The phase of the working stroke that is designed to split or dislodge calculus from the S root surface. It is prefaced by the exploratory stroke and followed by the shaving stroke.

has several meanings:

• Power stroke (engine), the stroke of a cyclic motor which generates force
• Ford Power Stroke engine, Ford diesel engine
• Power stroke: in baseball a batter who hits for extra bases is said to have a power stroke.

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