| 单词 | purge cock | 
| 释义 | > as lemmaspurge cock   purge cock  n. a cock for discharging fluid, sediment, dregs, etc., from a boiler or other apparatus. ΚΠ 1886    Sci. Amer. Suppl. 4 Sept. 8897/3  				When it becomes necessary to empty the receiver,..use is made of a purge-cock. 1925    J. T. Bowen Dairy Engin. xiii. 389  				Condensers are always provided with a purge cock located at the highest point of the condenser. 2002    J. Madden  & K. O. Smith Electr. Safety & Law 		(ed. 4)	 xv. 266  				Purge cocks are provided on the pit luminaires; these should be opened and then the compressor started to purge any gas from within them. < as lemmas | 
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