00000nz  a2200000n  4500
001  KSH1998042792
005  20021022000000
008  980629 n azknn|abn          |a a|a    | 
150  ▼a광신호[光信號]▲
450  ▼wr▼i영어▼aoptical signal▲
550  ▼wg▼a신호[信號]▲
550  ▼a광신호 처리[光信號處理]▲
550  ▼a광증폭[光增幅]▲