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由于变频调速技术和可编程程序控制器的应用灵活方便，在恒压供水系统中亦得到广泛的应用。
As the application of the frequency control technology and programmable logic controller is flexibility, in the constant pressure water supply system they has been widely used.
该变频器采用全数字控制，结构简单、控制灵活，为变频器产品的开发提出了一种全新的设计方法。
The inverter USES the full digital control method, so it is simple in construction, flexible in control. This paper presents a new design method of inverter product.
主机传动采用变频调速，PLC控制系统，可稳定灵活调整工作速度。
The main frame adopts frequency control speed PLC control system that adjust the work speed stably flexibly.
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