If the flood wave is deformed on its way of propagation, there exists acceleration term or inertia force that equals to internal friction.
波体在传播途中变形，则有加速项或惯性力，内摩阻力等于惯性力。
When the sample is at the stage of grinding damage, the axial force and torque are related to the Young? S modulus, cohesion and internal friction Angle except the compression strength.
而处于研磨阶段时，轴向压力、扭矩和试样弹性模量、黏聚力及内摩擦角有关，与抗压强度无关。
When the sample is at the stage of grinding damage, the axial force and torque are related to the Young? S modulus, cohesion and internal friction Angle except the compression strength.
而处于研磨阶段时，轴向压力、扭矩和试样弹性模量、黏聚力及内摩擦角有关，与抗压强度无关。
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