NdFeB permanent magnet invention in 1983, when the electronic computer, office automation, home appliances and the popularity of miniaturization of the critical moment, the urgent need for strong magnets, NdFeB not only high magnetic properties, and low prices, it came to the magnet Has brought a revolutionary change, while the global computer, communications and other industries have been rapid development, is currently the main force of rare earth magnetic materials, is a well-deserved permane