000  $anz n  2
000  $a주제어
001  $aKSH1998037659
005  $a20021231000000
008  $a980429 n azknnaabn          |a a|a    | 
150  $a역류[逆流]
450  $wr$i영어$arefluxing
550  $a역류 효과[逆流效果]
550  $a조류(파도)[潮流]
550  $a축합[縮合]