Home › Blog › Buying Guide › From Factory Floor to Your Workshop: Evaluating a Pre-Owned , Used , Secondhand, Surplus CNC Machines Before Purchase Doosan NM 510 CNC Vertical Machining Center made in South of Korea Here’s a structured, in-depth evaluation guide (from “factory floor → your workshop”) for assessing a pre-owned / used / surplus Doosan NM-510 vertical machining center (South Korea origin)....