理论 (kg/m) l0 11.261 l2 l3.987 12.6 l4.223 14 15.89 16 20.513 18 24. l43 20a 27.929 20b 31.069 22a 33.07 22b 36.524 24a 37.477 24b 41.245 25a 38.105 25b 42.03 27a 42.825 27b 47.064 28a 43.492 23b 47.888 30a 48.084 30b 52.794 30c 57.504 32a 52.7l7 32b 57.741 32C 62.765 36a 60.037 36b 65.689 36c 71.34l 40a 67.598 4Ob 73.878 40c 80.l58 45a 80.42 45b 87.485 45c 94.55 50a 93.654 50b l01.504 50c 109.354