... 3D automatic stone engraving machine ApplicationThis model can be used for granite,marble,sandstone,ceramic tiles ,glass,tombstone ,metal,also fit ... for wood ,MDF,PVC,arcylic,plywood,relief,etc.best after-sales ... structure,2.all square orbits,small driver3.ballscrew for z axis, gear-wheel for x axis and y axis,4.3kw (imported ...