00000nz  a2200000n  4500
001  KSH1998011880
005  19991222114226
008  980429 n azknn|abn          |a a|a    | 
150  ▼a결빙[結氷]▲
450  ▼wr▼i영어▼afreezing▲
550  ▼a결빙 지시계[結氷指示計]▲
550  ▼a동결(얼림)[凍結]▲
550  ▼a동결층[凍結層]▲
550  ▼a동상 현상[凍上現象]▲
550  ▼a빙점[氷点]▲
550  ▼a얼음[氷]▲
550  ▼a착빙[着氷]▲