图中可以看出，20 μm粒子速度与临界速度相交的点位于轴向距离0.03 m处，且在0.03-0.3 m区间内并无其他的交点，因此认定该粒径粒子在喷涂距离0.03 m后都可以在基体上实现沉积。

The figure shows that the point where the 20 μm particle velocity intersects with the critical velocity is located at an axial distance of 0.03 m, and there is no other intersection point in the interval of 0.03-0.3 m. Therefore, it is determined that the particle size can be deposited on the substrate after the spraying distance of 0.03 m.