00000nz  a2200000n  4500
001  KSH2006002755
005  20060426211750
008  060426 n azknn|abn          |a a|a    | 
150  ▼a가변수 함정[假變數陷穽]▲
450  ▼wr▼i영어▼adummy variable trap▲
550  ▼a가변수[假變數]▲