通过对三种风道系统的压力进行分析，认为应根据风机全压等于风管系统阻力损失来选择风机。

According to the analysis on pressure of three kinds of duct systems, concludes that the total pressure of a fan should be equal to the resistance loss of the duct system.

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试验结果表明，串联吸气全压与单风机全压相比在小流量区域全压显著增大，改善了风机的性能；

The results show that the pressure in series is increased markedly in small flow-rate area, so performance of the fans is improved.

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给出了一种根据现场有关实测参数，借助模型求取工作点流量和风机全压，以实现动态工作点监视的简便方法。

A simple method is presented to realize work point dynamic monitoring by solving the flow and the total pressure of the fan with the model and relative parameters got on the spot.

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