其中封闭式叶轮应用很广泛，前述的单吸叶轮双吸叶轮均属于这种形式。
Which closed impeller very broad application, the aforementioned single-suction aspiration impeller double impeller belong to this form.
其中封闭式叶轮应用很广泛，前述的单吸叶轮双吸叶轮均属于这种形式。
Which closed impeller very broad application, the aforementioned single-suction aspiration impeller double impeller belong to this form.
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