精度等级 |
| P | C |
1级(优秀) | ≤0.01 | >95% | <0.35 |
2级(良好) | ≤0.10 | >80% | <0.5 |
3级(合格) | ≤0.20 | >70% | <0.65 |
4级(不合格) | >0.20 | <70% | >0.65 |