| | 3.84% 340 | | | | | | 60~80 | | | 0.04~0.06% C | C | | 3~5 E | | E | | A D | | | 2 | 1~2 | 30~40℃ | 40 | | 40~50℃ | | | 100 1 | 0.5 30 | | |