00000nz a2200000n 4500 001 KSH2004031226 005 20040820011517 008 040820 n azknn|abn |a a|a | 150 ▼a내산성 벽돌[耐酸性壁--]▲ 450 ▼wr▼i영어▼aacid resistant brick▲ 550 ▼wg▼a내화 벽돌[耐火壁--]▲ 550 ▼a내산성[耐酸性]▲