To pump energy back into the grid, some of the rotational energy is bled off to power a generator on the main shaft.

把电能又送回电网时，就释放一部分转动的动能，开动位于主轴的发电机。

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These Smith pumps are reversible, so that the TC-2 pump can be used for loading or unloading without a manifold, if a reversing power take-off is available.

如果相反的动力输出是可用的，史密斯泵是可逆的，因此TC - 2泵用来装载或卸货不需要多功能装置。

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