varying head的意思|示意

In the technology reform of Dongjiang Pumping Station, a large scale axial -flow pump with double speed is used to fitting in with the nature of the pump head varying greatly.

东江泵站结合扬程变化幅度大的特点，在技术改造中采用双速全调节叶片的大型轴流泵机组型式，取得了明显的节能效益。

When you reach a hill put your head down and take it one step at a time – Most days of my training I was either running or biking and I would always come across hills of varying magnitudes.

低头爬山让你不畏险阻，一步一步脚踏实地才能勇攀高峰——在我的训练中很多时候都是跑步或者骑自行车训练，在这途中会穿过各种高低不同的山峰。

The active systems consist of several pumping systems of varying discharge pressure and flow rates, e. g., high head injection system, low head injection system.

能动系统由不同注入压力和流量的泵系统组成，如高压安注系统，低压安注系统。