| 单词 | proximity warning indicator | 
| 释义 | proximity warning indicator [präk`sim·ǝd·ē ¦wȯrn·iŋ `in·dǝ´kād·ǝr]  NAVIGATION An airborne instrument which produces a warning signal indicating the approach of an aircraft on a possible collision course. Abbreviated PWI.  | 
	
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