00000nz  a2200000n  4500
001  KSH2005000855
005  20050131174550
008  050131 n azknn|abn          |a a|a    | 
150  ▼a알파 방사성핵[放射性核]▲
450  ▼wr▼i영어▼aalpha-radioactive nucleus ▲
550  ▼wg▼a원자핵[原子核]▲
550  ▼a알파 붕괴[--崩壞]▲
680  ▼i알파붕괴하는 방사성 원자핵.▲