220-B is a metal powder dual laser 3D printing mini machine, designed with an integrated host and filtration system, featuring small body size, high energy, and easy maintenance; Adopting pure rolling high-speed powder spreading patented technology, it has the functions of long life and maintenance free; Adopting a precise quantitative powder feeding system to improve powder spreading efficiency and save materials. At the same time, it can cooperate with AGV equipment to achieve unmanned operation, providing efficient, precise, and environmentally friendly solutions for precision forming of metal parts in 3C, medical, automotive, and other industries.