000  $anz n  2
000  $a주제어
001  $aKSH2004030558
005  $a20040822115901
008  $a040822 n azknnaabn          |a a|a    | 
150  $a슬립 링[slip ring]
450  $wr$i영어$aslip ring
550  $wg$a전력 조절 장비[電力調節裝備]