Company Profile Founded in 1999, Dongguan Changlong Electronic Industry Co., Ltd. is one of the few professional processing plants in the industry with more than 20 years of Surface Mount Technology production and manufacturing experience. With the ......

... naked eye or magnifying glass, or optical microscope (for products with linearity less than 0.2mm), The sintered NdFeB magnet has a smooth surface, no visible particles and foreign matter, no spots, no falling edges, and the appearance is acceptable. ...