1.cnc engraver 2engraving for marble,granmtie,sandtone,inkstone,tombstone,steles 3.water-proof ... Spindle, continuously variable transmission, low noise, complete with carving tools, and embossed carving features.machine double water circulation system, ... stone and marble, granite, glass, tile, metal, wood, acrylic, aluminum composite panel and other hard surface for processing cutting, relief and ...