[sintered ndfeb magnet neodymium magnet permanent magnet neodymium iron boron magnet magnetical material wind turbine magnet rare earth magnet strong magnet generator magnet] [sintered ndfeb magnet neodymium magnet magnetical material rare earth magnet neodymium iron boron magnet permanent magnet strong magnet magnet wind turbine magnet] [magnet neodymium magnet rare erath magnet neodymium iron boron magnet ndfeb magnet wind turbine magnet permanent magnet magnetical material sintered ndfeb magnet strong magnet] [neodymium magnets sintered ndfeb magnet rare earth magnet permanent magnet wind turbine magnet magnet magnetical material neodymium iron boron magnet] [magnet;arc segment magnet;ring magnet;block magnet]