00000nz  a2200000n  4500
001  KSH1998039318
005  19980429165710
008  980429 n azknn|abn          |a a|a    | 
150  ▼a입사(기하학)[入射]▲
450  ▼wr▼i영어▼aincidence▲
550  ▼wh▼a경사 입사[傾斜入射]▲
550  ▼wh▼a수직 입사[垂直入射]▲
550  ▼a입사각[入射角]▲