minimum vertical support

• 最小垂直梯度

minimum vertical support的用法和样例：

例句

1. The minimum vertical clearance through the tunnel is 3m.
   这个隧道的最小垂直净空是三米。
2. A spin box consists of a text box and a small vertical scroll bar, commonly referred to as a spin button control.
   数字显示框由一个文本框和一个通常称为数值调节钮控件的小垂直滚动条组成。