000  $anz n  2
000  $a주제어
001  $aKSH1998003990
005  $a20040729214504
008  $a980429 n azknnaabn          |a a|a    | 
150  $a가스 업소버[gas absorber]
450  $wr$i영어$agas absorber
550  $wg$a완충기[緩衝器]
550  $a가스[gas]