00000nz  a2200000n  4500
001  KSH1998015803
005  19991005230347
008  980429 n azknn|abn          |a a|a    | 
150  ▼a일직선[一直線]▲
450  ▼wr▼i영어▼astraightness▲
550  ▼wg▼a직선[直線]▲
550  ▼a곡률[曲率]▲
550  ▼a곧음▲
550  ▼a기하학[幾何學]▲
550  ▼a대칭(수학)[對稱]▲
550  ▼a똑바름▲
550  ▼a선형(수학)[線形]▲