Secondly, it researches and summarizes the theory of primary air velocity measurement and establishes the theoretical basis as well as the design of the frame.
其次，对一次风速测量原理进行了研究和总结，确立了风速计算的理论基础，进行了总体结构框架的设计；
Secondly, it researches and summarizes the theory of primary air velocity measurement and establishes the theoretical basis as well as the design of the frame.
其次，对一次风速测量原理进行了研究和总结，确立了风速计算的理论基础，进行了总体结构框架的设计；
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