00000nz  a2200000n  4500
001  KSH1998000411
005  19980429124742
008  980429 n azknn|abn          |a a|a    | 
150  ▼aPMD▲
450  ▼wr▼i영어▼aphysical medium dependent▲
550  ▼aCDDI▲
550  ▼aFDDI▲