不需要改变管道的长度。

No change in piping length is required.

youdao

正如管道的长度和截面会影响水流一样，导体对电流的影响也是如此。

Just as the length and cro - section of the pipe affect the flow of water so it is with conductors of electric current.

youdao

遇 到需连接管道的长度比设计长度短的情况时，活动接头还可以起到延长管道的作用，使用 效果好。

When the length of a pipeline needing to be connected is shorter than the designed length, the movable connector can play a role in prolonging the pipeline and has good use effect.

youdao