... 4. Plastics Industry: Industrial plastics, engraving, milling and cutting5. Musical instrument industry: Violin carving, milling-shaped, etc.6. Industrial sheet ... four knives, such as the first head sculpture engraving and milling completed in the first process, you can switch ... : can be used for carving, engraving and milling, cutting, drilling, lateral drilling, side milling, sawing and so on. CNC ...