... Linear guide,running smoothly,high precision 2. steel seamless welding, good rigidity CNC Router for Engraving Stainless Steel Products ... Marble CNC EngraverSpecifications:This series of models are mainly used for heavy weight of the tile, bluestone,marble, granite, ... two line sliding track,heavy loading, stable working, high precision, long lifetime .2.Whole seamless weld steel structure, not easy ...