| | | | | | 25 30 EM | 80 100 | 2 3 | 10 15 2 3 | | | | 25 30 15 20 | 2 3 | | 0.3 0.5% | 3 5 | 5 6 8 10 | | C | 0.1 0.2% C | 2 3 7 10 | 3 5 | | | | | | |