| 单词 | air whistle | 
| 释义 | > as lemmasair whistle   air whistle  n. a whistle operated by the force of compressed air; cf. steam-whistle n. ΘΚΠ society > communication > indication > signalling > audible signalling > signalling with other sounding instruments > 			[noun]		 > sounding of whistle > types of whistle used as signal steam-whistle1840 air whistle1853 police whistle1872 bull1884 1842    Times 9 Dec. 5/5  				The plan proposed for working the condensed air whistle is extremely simple.]			 1853    Times 24 Mar. 3/5  				Another of the exhibitors proposed to use an air whistle, placed in the guard's van, the air to be pumped into a cylinder fitted with a safety-valve, and worked by means of a piston rod and eccentric attached to one of the van axles. 1870    W. Boyd Morse Alph.  				Telegraphy by steam-whistle, air-whistle, musical instrument, or light. 1975    Amer. Ethnol. 2 279  				Locomotive whistle and communicating (air whistle inside of locomotive cab) signals use many combinations of long and short whistles. 2005    Daily News 		(New Plymouth, N.Z.)	 		(Nexis)	 27 Sept. 4  				It has a micro-processor which produces synthesised steam loco noises... There is also an air-whistle. < as lemmas | 
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