| 单词 | cup-valve |
| 释义 | > as lemmascup-valve cup-valve n. see quot. ΚΠ 1849 J. Weale Rudim. Dict. Terms Archit. i. 130/1 Cup-valve, for a steam-engine. 1874 E. H. Knight Pract. Dict. Mech. Cup-valve. (Steam-engine.) a. A cup-shaped or conical valve, which is guided by a stem to and from its flaring seat. b. A form of balance-valve which opens simultaneously on top and sides. c. A valve formed by an inverted cup over the end of a pipe or opening. < as lemmas |
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