| 单词 | radio direction finder | 
| 释义 | > as lemmasradio direction finder   radio direction finder  n. = direction-finder n. at direction n. Compounds 2; abbreviated RDF. ΘΚΠ the mind > attention and judgement > discovery > instrument for detection > 			[noun]		 > radar system > apparatus used in > direction finder radiogoniometer1908 radio direction finder1916 goniometer1921 1916    Science 25 Feb. 276/2  				The success of the Bureau of Standards in developing a radio-direction finder. 1966    McGraw-Hill Encycl. Sci. & Technol. 		(rev. ed.)	 IV. 232/2  				This ground-based radio direction finder, operating at frequencies of 2 to 20 megacycles, is used mainly for navigational assistance in the long-distance en-route zone. 1992    W. F. Buckley WindFall v. 69  				If necessary we would home in on Funchal using the Radio Direction Finder. < as lemmas  | 
	
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