短語詞組短語principal horizontal stress 主水平應(yīng)力principal pressure stress 主壓應(yīng)力principal compression stress 主壓應(yīng)力first principal normal stress 第一主應(yīng)力maximum principal effective stress 最大有傚主應(yīng)力principal l stress 枝力intermediate principal normal stress 中間主正應(yīng)力intermediate principal shear stress 中間主剪應(yīng)力principal compressive stress axis 主壓應(yīng)力軸 返回 principal stress