| 单词 | wheel-draught | 
| 释义 | > as lemmaswheel-draught   wheel-draught  n. a current of smoke and hot air in a steam-engine, circulating continuously in one direction. ΘΚΠ the world > matter > gas > air > moving air > 			[noun]		 > a movement of air > a current of air > circulating in a steam engine wheel-draught1871 1871    Routledge's Every Boy's Ann. 529  				A wheel-draught; that is to say, the current of flame and smoke, after passing along the bottom of the boiler, rises up at the end. < as lemmas | 
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