清掃延長
  φ150 L = 50.64m
  φ200 L = 361.91m
  φ250 L = 8726.58m
  φ300 L = 1888.65m
  φ350 L = 1158.09m
  φ400 L = 1163.15m
  φ450 L = 475.60m

計    L = 13824.62m