Additionally, the Y-shaped layout was specifically calibrated to minimize local wind forces.

此外，Y 形布局经过专门校准，以最大限度地减少当地的风力。

The fall speed of hail primarily depends on the size of the hailstone, the friction between the hailstone and surrounding air, the local wind conditions (both horizontal and vertical), and the degree of melting of the hailstone.

冰雹的下落速度主要取决于冰雹的大小、 冰雹与周围空气的摩擦力、当地的风力条件（ 水平和垂直） 以及冰雹的融化程度。