计算弦长为L=8m、相对厚度为0.12的对称儒科夫斯基翼型受到的摩擦阻力和摩擦阻力系数，附面层厚度分布（附报告）-Calculated chord length L = 8m, the relative thickness of 0.12 Ru Khodorkovsky symmetric airfoil subject to friction and friction coefficient, boundary layer thickness distribution (with report