This segmented V-notched ball also provides excellent rangeability and an unobstructed flow passage which makes it ideal for this type of service.
这种分割V型缺口球也提供了良好的可调范围和流道通畅性，这使得它非常适合于这种类型的应用。
For pumping storage stations with wide rangeability of head and discharge, a speed-adjustable motor-generators can be used for improving operation condition.
在水头、负荷变化范围较大的蓄能电站中，为改善机组运行工况，可以采用速度可调的发电电动机。
For pumping storage stations with wide rangeability of head and discharge, a speed-adjustable motor-generators can be used for improving operation condition.
在水头、负荷变化范围较大的蓄能电站中，为改善机组运行工况，可以采用速度可调的发电电动机。
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