00000nz  a2200000n  4500
001  KSH2004022341
005  20040723094351
008  040723 n azknn|abn          |a a|a    | 
150  ▼a산촉매제[酸觸媒劑]▲
450  ▼wr▼i영어▼aacid catalyst▲
550  ▼wg▼a촉매제[觸媒劑]▲