距离/cm | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 |
K值 | 1350 | 1372.5 | 1400 | 1475 | 1470 | 1470 | 1480 | 1507.5 | 1500 | 1512.5 |