The nominal head was presented for preliminary selection of hydraulic models, with consideration of the efficiency and reliability at all operation conditions.

为了兼顾各种特征扬程工况下的运行效率和可靠性，在水力模型初选阶段提出了选型名义扬程的概念。

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Through the collecting of manufacturing data, the workshops' control on machinery has been strengthened and more things to monitoring the efficiency of nominal work hours have been done.

通过生产过程数据的采集，提高了制作部对生产设备运转状态的控制，丰富了制作部对操作人员制度工时利用率的控制手段。

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