Airflow noise in duct should be controlled within the range of standard during duct design.
风道设计中要求风道的气流噪声必须控制在允许的范围内。
The dimensions of these bubbles can be controlled simply by changing the velocity of the airflow across the surface.
这些气泡的结构可以通过改变空气在表面的流速来控制。
Servo-controlled airflow and pivoting flexible medium pressure line.
中央控制的气流和旋转灵活的中等的压力线。
The speed of airflow in the reformed house was controlled well. Heat stress was ameliorated effectively in the summer, performance of layer flock was improved distinctly.
经过改造后鸡舍内的气流速度更好地得到控制，对热应激起到了明显的缓解，鸡群的生产性能得到明显提高。
The speed of airflow in the reformed house was controlled well. Heat stress was ameliorated effectively in the summer, performance of layer flock was improved distinctly.
经过改造后鸡舍内的气流速度更好地得到控制，对热应激起到了明显的缓解，鸡群的生产性能得到明显提高。
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