As high-efficiency and high-quality printing equipment, with mainstream forming size, HBD 350 series are compatible with single/dual laser configuration, efficient and stable powder supply and recoating system, closed automatic powder circulation system, and independent long-term multi-stage purification system. With these configurations, HBD 350 series could meet high efficiency, intensity, quality, continuous production requirements, and it is suitable for mold, aerospace, medical equipment, auto parts manufacturing and other fields.