00000nz  a2200000n  4500
001  KSH1998026545
005  20021230000000
008  980429 n azknn|abn          |a a|a    | 
150  ▼a에어로겔[aerogels]▲
450  ▼wr▼i영어▼aaerogels▲
550  ▼a다공질 재료[多孔質材料]▲