1.manual grinding machine , 2.Stone surface smoothing, grinding and polishing. 3.passed CE certificate and ISO 9001:2000 Manual Polishing machinesMAJOR TECHNICAL PARAMETERS: Grinding dimension 1800x1200mm Main engine power 3 kw Rotational speed 740/min Outline dimension 3000x1700x600mm Total Weight 600 KGSSTRUCTURE AND FEATURES: Stone surface smoothing, grinding and polishing.