| 单词 | working door | 
| 释义 | > as lemmasworking door   working door  n. chiefly Metallurgy a door or shutter that covers an opening giving access to a furnace. ΘΚΠ society > occupation and work > equipment > furnace or kiln > furnace > parts of furnace > 			[noun]		 > openings for metal or crucible tympa1650 working arch1824 tap-hole1825 working door1839 tapping-hole1861 slag notch1882 1839    A. Ure Dict. Arts 325 		(caption)	  				The working doors. 1877    R. W. Raymond Statistics Mines & Mining 393  				The furnace has a working door at the side, and a charging door at the end. 1922    J. J. Deans Iron Puddler xv. 97  				Through this working door I put in the charge of ‘pigs’ that were to be boiled. 1999    U.S. Patent 5,882,578 7/1  				The hearth furnace portion has..a working door for drawing off the slag. 2011    Q. R. Skrabec Edward Drummond Libbey iii. 39  				The large domed furnace had a working door for each pot of glass, known as a Bocca. < as lemmas  | 
	
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