| 释义 |
▪ I. ˈsnifting, vbl. n.
[f. snift v.]
a. The action of sniffing; also attrib.
b. (See quot. 1890 and snift n.)
c1430Freemasonry (Halliw. 1840) 36 From spyttynge and snyftynge kepe the also. 1755Johnson, Snuff,..resentment expressed by snifting. 1849Craig s.v. Snift, The snifting noise made by the air in making its escape. 1890Star 5 Nov. 4/1 There is no necessity for what under the ordinary system is called ‘snifting’—the process by which the air in the bottles is allowed to escape.
▪ II. ˈsnifting, ppl. a.
[f. snift v.]
snifting valve, a valve through which air may be expelled from the cylinder of a condensing steam-engine. So † snifting clack, snifting pipe.
(a)1744Desaguliers Exp. Philos. II. 474 This is call'd the Snifting Clack, because the Air makes a Noise every time it blows thro' it, like a Man snifting with a Cold. 1812Smeaton Rep. I. 227 The steam, finding a passage at the snifting clack..blows out thereat. [1873Evers Steam & Steam Eng. iii. 50 A valve to preserve the vacuum, which valve, from the peculiar noise it made, was called the snifting valve, or snifting clack.]
(b)1759H. Wood Pat. Specif. No. 739. 2 If the hot air be driven into the cylinder with a force superior to the pressure of the atmosphere, that force will drive out the condensed air through what is now called the snifting pipe.
(c)1822J. Robison Syst. Mech. Phil. II. 61 The steam from the boiler will immediately rush in, and..will force the air to issue by the snifting-valve. 1846A. Young Naut. Dict. 302 The tail-valve, or snifting-valve, is at the opposite side of the air-pump from the condenser. 1878Thurston Growth of Steam-Eng. 138 A snifting-valve, k, opens when the engine is blown through. |