Using the equation,regarding the projection angle as a small quantity, neglecting the differentiation of the absolute value of the tangential velocity with respect to the time,the P.C. Chou formula was easily obtained.

• 利用爆轰驱动平板的抛射角方程；在小抛射角条件下；假设切向速度大小随时间的变化率为零；很容易得到周培基(P.；C