00000nz a2200000n 4500 001 KSH2002012231 005 20021016000000 008 020518 n azknn|abn |a a|a | 150 ▼a유자곡[--字谷]▲ 450 ▼wr▼i영어▼aU-shaped valley▲ 550 ▼wg▼a계곡[溪谷]▲ 550 ▼a빙식곡[氷蝕曲]▲