The longer line represents the positive pole .

较长的线代表正极。

Drag onto the page. the longer line represents the positive pole.

拖到绘图页上。较长的线代表正极。

The action of the negative pole of a magnetic needle is just as real as the action of the positive pole.

一根磁针的磁极作用，无论正负都是一样的真实。

The action of the negative pole of a magnetic needle is just as real as the action of the positive pole .

这个效应表明，有一种垂直于圈平面的力作用在磁极上。

This paper introduced the design of a new type salt heat exchanger on the principle of sacrifice of the positive pole.

本文针对盐水预热器的破坏特征，以阳极牺牲法为依据，设计了一种新型盐水预热器。