| 单词 | port face |
| 释义 | > as lemmasport face port face n. (in a steam engine or internal combustion engine) the surface of the block containing the ports through which steam or fuel enters and exhaust material leaves. ΚΠ 1890 Cent. Dict. Port-face, the flat surface in the steam-chest of a steam-engine. 1967 Autocar 5 Oct. 7/2 The Triumph 2000 port face is ‘inboard’ of the holding-down studs. 2001 Model Engineer 9 Feb. 121/1 The cylinder of this engine differs in construction from normal practice in that it features a false port face. < as lemmas |
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