... Option: servo system) 3 CE BD1218 stone engraving machine Application 1. Granite, Marble, Bluestone, Sandstone and other stone engraving2. Hard ... loading capacity, smooth operation, high precision, long life, the knife with precision steel seamless welding machine 2. it really rigid ... deformation, the work table backing plate, high strength and good rigidity, machine loading capacity of up to a ton ...