000  $anz n  2
000  $a주제어
001  $aKSH2002014501
005  $a20021019000000
008  $a020608 n azknnaabn          |a a|a    | 
150  $a음향 여파기[音響濾波器]
450  $a음파 여파기[音波濾波器]
450  $wr$i영어$aacoustic wave filter
550  $wg$a여파기[濾波器]