We have seen in the market most of the magnetizing cup with magnets, plus or minus pole points.

咱们在市场上所见到的磁化杯大多采用一般磁铁，正负极不分。

youdao

We have seen in the market most of the magnetizing cup with magnets, plus or minus pole points.

咱们在市场上所见到的磁化杯大多采用一般磁铁，正负极不分。

youdao