| 单词 | power stroke |
| 释义 | > as lemmaspower stroke power stroke n. the stroke of an internal combustion engine during which the piston is moved by the expansion of the gases in the cylinder; (in extended use) the stroke of any reciprocating or oscillating object during which force is exerted by it or on it. ΘΚΠ society > occupation and work > equipment > machine > machines which impart power > engine > internal-combustion engine > [noun] > piston > movement in compression stroke1894 power stroke1903 1903 Work 9 May 218/2 Such engines have only one power stroke in every four. 1958 J. E. Morton Molluscs ii. 42 The paired wings..rest horizontally... The animal moves upwards or forwards by sculling with them, twisting them at the ‘wrist’ to allow a power stroke at both the upward and downward beat. 1966 E. Rudinger Consumer's Car Gloss. 113 In a four-stroke engine, there is only one power stroke in every four. 1991 Bicycling Feb. 90/1 I should have my heel below the pedal during the power stroke and above it during recovery. 2000 P. W. B. Semmens & A. J. Goldfinch How Steam Locomotives really Work iv. 148 The average pressure on the piston throughout the power stroke..is theoretically the same as the boiler-pressure related to atmospheric. < as lemmas |
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