现在的通常作法是按比例缩小的桥梁模型放在风洞里检测它们的空气动力抵抗力。
It is now common practice to test scale models of Bridges in wind tunnels for aerodynamic resistance.
如果风洞直接从大气中吸进空气，那么使用的是完全新鲜的空气。
If the tunnel draws its air directly from the atmosphere, entirely fresh air is used.
环境影响评价，空气质量模式，大气湍流，空气污染模拟及其它风工程风洞试验。
Environmental impact assessment, air quality modeling, atmospheric turbulence, air pollution simulating and other wind engineering simulation with wind tunnel.
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