利用风速廓线法测定小麦不同生长期的空气动力学粗糙度：青苗期的平均粗糙度最大，为6。
Using wind velocity profile law determinate the aerodynamic roughness length of wheats different growth periods: the average roughness of shooting period, is 6.
目前最常见的斜拉索空气动力措施有螺旋线措施和凹坑措施。
The most common cable aerodynamic measures is enlace spiral and press pits on the surface.
目前最常见的斜拉索空气动力措施有螺旋线措施和凹坑措施。
The most common cable aerodynamic measures is enlace spiral and press pits on the surface.
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