high efficiency area of pump-operation
high efficiency area of pump-operation
泵的高效运行区域
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The parallel-connection and variable-speed operation characters of the centrifugal pump groups are studied by conics fitting of the character curves in the high efficiency area.
通过对离心式水泵高效工作区的性能曲线进行二次拟合，分析了离心式水泵机组并联调速运行特性。
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