00000nz  a2200000n  4500
001  KSH1998042651
005  20021023184732
008  980625 n azknn|abn          |a a|a    | 
150  ▼a고주파 정류기[高周波整流器]▲
550  ▼wg▼a정류기[整流器]▲
550  ▼a광석 검파기[鑛石檢波器]▲