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At a certain speed, the pressure coefficient of the backward-facing impeller is small, so the impeller diameter is larger and the efficiency is higher. The opposite is true for the forward impeller.... View More>>

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The environment of the subway station and the tunnel is very different from the ground venue. It is relatively closed, large, large, and there are many heating sources. In order to ensure the normal operation of the tunnel equipment, ensure that the air c... View More>>