000  $anz n  2
000  $a주제어
001  $aKSH1998009700
005  $a19991207141203
008  $a980429 n azknnaabn          |a a|a    | 
150  $a검파 회로[檢波回路]
450  $wr$i영어$adetector circuit
550  $wg$a회로[回路]
550  $a검파[檢波]