... materials High precision High speed Low price Hard Materials(stone, marble, granite etc) CNC EngraverA.Process hard materialsB.High precisionC ... .High speedD.Low price Hard Materials(stone, marble, granite etc) CNC Engraver Features:A.Germany double nuts ... the long time use precision is high. Hard Materials(stone, marble, granite etc) CNC Engraver Configuration: 1. Whole steel structure ...