由于外界条件的变化与差异，泵站的实际运行工况总是或多或少地偏离设计最佳工况。
Because of the change and difference of external condition, practical operating mode of pumping station always deviates from the design's more or less.
由于外界条件的变化与差异，泵站的实际运行工况总是或多或少地偏离设计最佳工况。
Because of the change and difference of external condition, practical operating mode of pumping station always deviates from the design's more or less.
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