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1前言近十年来，我国在脱磁器方面的研究工作取得了较大的进展。从其发展趋势看，工频脱磁器和中频脱磁器将会被淘汰。最有发展前途的是脉冲脱磁器，这种类型的脱磁器目前也出现了多种，不过它们的主要工作原理是相同的，不同之处在于触发电路不相同。从它们各自的使用情况看，
1 Preface In the past ten years, great progress has been made in China’s research on demagnetization. From its development trend, power frequency demagnetizer and IF demagnetizer will be eliminated. The most promising is the pulse demagnetizer, this type of demagnetizer has also appeared a variety of, but their main principle is the same, the difference is that the trigger circuit is not the same. Judging from their respective use cases,