| | | | | 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 | | | |