| 单词 | running trap | 
| 释义 | > as lemmasrunning trap   running trap  n. Plumbing a U-bend fitted in a horizontal pipe, often in order to allow gases to escape from a piping system through an attached vent. ΚΠ 1880    Daily Evening Bull. 		(San Francisco)	 8 May 1/3  				The drain pipes must..have all necessary tends and junction pieces, and a running trap where directed. 1912    Public Health Rep. 		(U.S. Public Health Service)	 27 1784  				A running trap of extra heavy pipe..with a double vent shall be placed on every house sewer at an accessible point. 1985    D. Holloway Which? Bk. Plumbing & Central Heating v. 61/3  				The running trap, a P-trap with horizontal inlet and outlet. 2002    R. D. Treloar Plumbing: Heating & Gas Installations 		(ed. 2)	  vii. 276  				Those [traps] fitted in a pipe run, called running traps. < as lemmas  | 
	
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