00000nz  a2200000n  4500
001  KSH1999015202
005  19990601122935
008  990430 n azknn|abn          |a a|a    | 
150  ▼a기계적 퇴적 작용[機械的堆積作用]▲
450  ▼wr▼i영어▼amechanical sedimentation▲
550  ▼wg▼a퇴적 작용[堆積作用]▲