n.去磁；退磁
This class of magnets, aside from good resistance to demagnetization, has the popular advantage of low cost. 这类磁铁，除了具有良好的抗退磁能力以外，还有低成本的显著优势。
The decay oscillating wave pulses can be applied in situations such as demagnetization of permanent magnets. 交流衰减波电流可用于永磁体的退磁等应用中。
