00000nz  a2200000n  4500
001  KSH1999016288
005  19990421161040
008  990421 n azknn|abn          |a a|a    | 
150  ▼a기조력[起潮力]▲
450  ▼wr▼i영어▼atidal force▲
550  ▼a달(천체)[月]▲
550  ▼a동역학적 조석론[動力學的潮汐論]▲
550  ▼a조력(파도)[潮力]▲
550  ▼a조석[潮汐]▲