Remove all nuts and bolts from cover plate and take off plate.

从盖板上拆卸所有螺母和螺栓，然后将盖板拿开。

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Reattach cover plate to make an air and water tight seal.

重新固定盖板，并紧密密封防止空气和水通过。

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The impeller by the blade, and the cover plate and the hub.

叶轮由叶片、盖板和轮毂组成。

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The impeller by the blade, and the cover plate and the hub.

叶轮由叶片、盖板和轮毂组成。

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