| 释义 |
valving, vbl. n.|ˈvælvɪŋ|
[f. valve n.1 + -ing1.]
a. A system or arrangement of valves; valves collectively.
b. Opening and shutting in the manner of a valve; valve-like operation.
1948Chem. Industries Feb. 222/1 (heading) Valving CC's. 1957Petroleum Engineer Oct. c. 66 (heading) Valving critical in elaborate distribution system. 1968Jrnl. Dental Res. XLVII. 1013/2 Physiologic and temporal features of oral and palatopharyngeal valving were correlated with velocity and volume of oral-nasal flow, and intraoral air pressure. 1973Sci. Amer. Dec. 143/1 [A giraffe's] elevated brain is supplied with oxygen by blood vessels that manage a lot of valving and pumping. 1978Ibid. May 38/1 The valving [of the Newcomen steam engine] was automatic from a very early stage. 1981Jrnl. Air Pollution Control Assoc. XXXI. 377 Thermal mass flowmeters, with microprocessor controlled flow and automatic valving, supply variable levels of concentrated odorant and clean dilution air to a static mixing device. |