00000nz  a2200000n  4500
001  KSH2004024074
005  20040722132428
008  040722 n azknn|abn          |a a|a    | 
150  ▼a베타 선원[--線源]▲
450  ▼wr▼i영어▼abeta source▲
550  ▼a동위 원소[同位元素]▲