2/3*14.3*1000*0.785*0.5*（sin(3.14159*0.281）)^3/3.14159+300*25445/1000 *0.45*（sin(0.281）+sin(3.14*(1.25-2*0.281))/3.14159
    0.281*14.3*1000*0.785*（1-（sin(2*3.14159*0.281）/（2*3.14159*0.281））)+（3*0.281-1.25）*300*25445/1000
    0.285*14.3*1000*0.785*（1-（sin(2*3.14159*0.285）/（2*3.14159*0.285））)+（3*0.285-1.25）*300*25445/1000
    0.28*14.3*1000*0.785*（1-（sin(2*3.14159*0.28）/（2*3.14159*0.28））)+（3*0.28-1.25）*300*25445/1000
    0.27*14.3*1000*0.785*（1-（sin(2*3.14159*0.27）/（2*3.14159*0.27））)+（3*0.27-1.25）*300*25445/1000
    0.29*14.3*1000*0.785*（1-（sin(2*3.14159*0.29）/（2*3.14159*0.29））)+（3*0.29-1.25）*300*25445/1000
    0.3*14.3*1000*0.785*（1-（sin(2*3.14159*0.3）/（2*3.14159*0.3））)+（3*0.3-1.25）*300*25445/1000
    0.46*14.3*1000*0.785*（1-（sin(2*3.14159*0.46）/（2*3.14159*0.46））)+（3*0.46-1.25）*300*25445/1000
    0.46*14.3*1000*0.785*（1-（sin(2*3.14159*0.46）/（2*3.14159*0.46））+（3*0.46-1.25）*300*25445/1000
    0.97×1.9/(8.9-1) [3.99×(1-1)+(3.99×1)/(2-1) (1-1/〖8.9〗^(2-1) )-1/(1.38-1) (1-1/〖8.9〗^(1.38-1) )]
    2/3*14.3*400^3*(sin(0.293*180))^3+360*7500*400*(sin(0.293*180)+sin(0.664*180))/π=
    2/3*14.3*400^3*(sin(0.289*180))^3+360*7000*400*(sin(0.289*180)+sin(0.672*180))/π=
    (46.71√(1.36/(826.12-1.36))+1.36×0.08125×3.6)/(1×0.128×17.33)×100%
    (1.18×10^3×1.40×5500)/(30×4)×10^(-3)
    2-0
    3（3-1）
    2（2-1）
    1（1-1）
    sqrt(1940)
    sqrt(2410)

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