improve in order to meet the requirements of practical application.

multi pole ring magnets gauss magnetic generally, often used in speakers, speakers and other equipment.NdFeB magnets are the advantages of cost-effective, with good mechanical properties; downside is that the low point of the Curie temperature, the temperature characteristics are poor, hump magnets and easy-powder corrosion, so it must be adjusted to take its chemical composition and surface treatment method

improve in order to meet the requirements of practical application.