Para. | I | II | III | IV | V | VI | VII | VIII |
S≥ | 0.95 - 1.00 | 0.90 - 0.95 | 0.85 - 0.90 | 0.80 - 0.85 | 0.70 - 0.80 | 0.60 - 0.70 | 0.50 - 0.60 | <0.5 |
P/% | 95 - 105 | 90 - 110 | 80 - 120 | 75 - 125 | 70 - 130 | 60 - 140 | 50 - 150 | 0-¥ |
a< | 0.05 | 0.10 | 0.15 | 0.20 | 0.30 | 0.40 | 0.50 | >0.50 |
Quality | best | better | good | fine | moderate | common | defective | inferior |