The girls lined up behind the starting line, ready to dribble the ball to the cone at the other end of the court, and back again.

Based on the uniform geometrical theory of diffraction, the equivalent current is used to calculate the back scattering field for the finite cone.

It shows that the effects of back pressure on penetration, spray cone Angle, and decline rate of centerline velocity and concentration of the spray are greater than that of fuel injection pressure.