Features and advantages of the granite feet: 
 1, good rigidity, high hardness, wear resistance 
 Uniform, rock by a long-term natural aging, organizational structure, a very small linear expansion coefficient, internal stress completely disappeared, no deformation, so high precision. 
 3, not afraid of acid, alkaline liquid material erosion, and will not rust, do not need oiling, easy to stick dust, maintenance, easy maintenance, long service life. 
 4, magnetization measurements can move smoothly, Zhise sense, free from damp impact, plane stability. 
 5, no scratches, not a constant temperature to prevent temperature measurement accuracy can be maintained at room temperature. 
 Granite feet http://www.bthxzw.com/huagangshifangchi.html 
 Granite feet: mainly used for the detection of parallelism perpendicularity. Main mineral components of granite feet to escape the stone, plagioclase, minor olivine, biotite, and trace magnetite, black color, structure, precision codes, after millions of years of aging, even texture, good stability, strength, high hardness, and maintain high precision in heavy load. 
 Granite square feet in industrial production and laboratory measurements. Proportion :2970-3070kg / m3. Compressive strength :2500-2600kg / cm3. Elasticity coefficient :1.27-1 .47 × 106N/mm2. Water absorption: 0.13%. Shore hardness: HS70 above. 
 Granite feet http://www.bthxzw.com/huagangshifangchi.html 
 The Botou Navistar cast material measuring 
 Tel: 5664468 13373071795 
 Contact: Xin Yue