| 单词 | bell-trap | 
| 释义 | > as lemmasbell-trap   bell-trap  n. a stench-trap resembling a bell in shape. ΘΚΠ the world > physical sensation > cleanness and dirtiness > sanitation > provision of sewers > 			[noun]		 > sewer > trap > types of well trap1819 bell-trap1867 ball trap1873 siphon trapa1884 pot trap1884 1867    W. Papworth Gwilt's Encycl. Archit. 		(rev. ed.)	  ii. iii. 661  				The usual iron bell trap, as supplied to a sink. < as lemmas | 
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