求翻译：同时交链一次，二次绕组的磁通量的相量为φm ,该磁通量称为主磁通。是什么意思？

While cross-linking the first and second phase windings of the amount of magnetic flux φm, the magnetic flux as the main flux.

In addition to the chain, a winding 2 times the volume of magnetic flux is φ m, the magnetic flux as magnetic flux.

The transformer may divide into according to the use: The distribution transformer, the power transformer, all seal the transformer, the combined transformer, the dry transformer, the oil bath type transformer, the single phase transformer, the electric stove transformer, the rectification transform

While chain, secondary windings for the amount of magnetic flux φ m, the magnetic flux is called the primary flux.

While chain, secondary windings for the amount of magnetic flux φ m, the magnetic flux is called the primary flux.