This multi-spindle cold engraving machine excels particularly in roughing and thinning of mobile phone back covers, precision finishing of large surfaces, and integrated CNC white plate forming for contouring and drilling. Its efficiency is over 10 times higher than traditional single-head segmented processing, with a processing accuracy of ±0.01. It occupies an area 60% smaller than a single-head machine and saves 60% in labor costs. The core large grinding head requires repair only once a month!