00000nz  a2200000n  4500
001  KSH1998033644
005  20031024005436
008  980429 n azknn|abn          |a a|a    | 
150  ▼a비화학적 분급기[非化學的分級器]▲
450  ▼wr▼i영어▼anonchemical classifiers▲
550  ▼a침하기[沈下器]▲