000  $anz n  2
000  $a주제어
001  $aKSH1998034139
005  $a20021231000000
008  $a980429 n azknnaabn          |a a|a    | 
150  $a헤테로다인[heterodyne]
450  $wr$i영어$aheterodyne
550  $a복조(통신)[復調]
550  $a슈퍼헤테로다인 수신기[--受信機]