00000nz  a2200000n  4500
001  KSH2004042152
005  20041221164051
008  041221 n azknn|abn          |a a|a    | 
150  ▼a반향 억제기[反響抑制器]▲
450  ▼wr▼i영어▼aecho suppressor▲
550  ▼wg▼a억제기[抑制器]▲
550  ▼wh▼a단말 반향 억제기[端末反響抑制器]▲