本文所得到自然对流空气层的最佳间距和各因素变化对于双层屋面隔热效果的影响，都可以为工程应用提供一定的参考。
The study proposed the optimal spacing for natural convection layer and the effects of some factors on the thermal performance of the roof which can give the references for applications.
同时间距控制装置会根据风速旋转安装在轴承上的风叶，保持在最佳角度。
A pitch controller rotates each blade around a bearing, setting it to the best angle for the wind speed.
机器的最佳速度设置是尽量低的设置，使之能产生最佳的产品间距，以便达到机器预期的处理量?。
The best speed setting for the machine is the slowest possible setting with the optimum product spacing to achieve the desired machine throughput.
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