... CNC Engraving machine 1.ball screw with high precision 2.used in mold,advertising industry 3.300 ... ,Preload, steel and good, high accuracy.2. Ground-level precision ball screw, tightening and high precision.3. Interface use international standards ... dials. 3.Mould:architecture, Gilt membrane, electric machinery, High frequency mold, moulding on shoes, badge, embossed mould, biscuit, candy, chocolate ...