If the friction had not been so great, the pump would not have been damaged.

如果摩擦力没有那么大的话，这台泵本来是不会坏的。

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Pipe friction is the resistance to flow caused by the pipe. As a general principle, it is better to use the largest practical pipe size to avoid losses in pump performance.

管道摩擦力是指由管道引起的流动阻力，作为一个常用原则，最好是使用最大的实用的管道尺寸以避免在水泵性能方面的损失。

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A lot of study showed that the friction of the ball friction coupling between piston and slipper obviously affected the life-span and the performance of the axial piston pump.

大量的研究表明，柱塞与滑靴之间的球铰副摩擦力很大程度上影响着轴向柱塞泵的性能及寿命。

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