| 单词 | quarter-wave attenuator | 
| 释义 | quarter-wave attenuator [`kwȯrd·ǝr ´wāv ǝ`ten·yǝ´wād·ǝr]  ELECTROMAGNETISM Arrangement of two wire gratings, spaced an odd number of quarter-wavelengths apart in a waveguide, used to attenuate waves traveling through in one direction.  | 
	
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