A medium-thick shelterbelt can reduce wind velocity by more than 10 percent to a distance of 20 times the tree height on the leeward side and three times the height to the windward.
中等厚度的防风林在背风侧可在20倍于树高的距离而在迎风侧则在3倍于树高的距离上减小风速10%以上。
A leeward side of the box is provided with at least one air outlet having a vent check valve.
所述箱体的背风面至少具有一个带有出气单向阀的出气口。
Each rise correlates with the windward-facing slope of the terrain, while declines in cloudiness are found in valleys on the leeward side.
图中每一处云量的上升都与迎风面斜坡相关，同时，云量的下降出现在背风面的山谷。
The ratio of mean tracer concentrations on leeward side to that on wind-ward side was about8 for street canyons where the space between buildings was small.
对于楼之间空间较小的街谷，背风面和迎风面的示踪剂浓度平均比值可达8。
In the case of Angle of attacks, the high pressure region before the leeward side jet enlarged, the region of jet wraparound effect moving forward, and the jet interaction control was more effective.
有攻角时，背风侧喷流前的高压区更大，喷流包裹作用的影响区域前移，喷流的控制效果更好，这一趋势随攻角的增大更加明显。
In the case of Angle of attacks, the high pressure region before the leeward side jet enlarged, the region of jet wraparound effect moving forward, and the jet interaction control was more effective.
有攻角时，背风侧喷流前的高压区更大，喷流包裹作用的影响区域前移，喷流的控制效果更好，这一趋势随攻角的增大更加明显。
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