Granite foot rectangular marble square, the use of high quality "Jinan Qing" stone machined and made of hand-grinding. Shiny black, structural precision, uniform texture, good stability, high strength, high hardness, in the bottom of heavy-duty and general temperature precision, and has no rust, acid and alkali, abrasion resistance, not magnetized, the same type advantages. 
 Granite foot rectangular http://www.bthxzw.com/huagangshizhijiaochi.html 
 Granite square features and advantages: 
 Uniform a rock by a long-term natural aging, organizational structure, a very small linear expansion coefficient, internal stress completely disappeared, no deformation, so high precision. 
 2, good rigidity, high hardness, wear resistant. 
 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, no scratches, not a constant temperature to prevent temperature measurement accuracy can be maintained at room temperature. 
 5, magnetization measurements can move smoothly, Zhise sense, free from damp impact, plane stability. 
 Flatness, perpendicularity, straightness measurement granite rectangular device is mainly used for the workpiece. Foot rectangular granite mineral composition for the escape of stone, plagioclase, minor olivine, biotite, and trace magnetite, black color, structure, precision, after millions of years of aging, even texture, good stability, strength, high hardness, and maintain high precision in heavy load. Applicable to industrial production and laboratory measurements. 
 Granite foot rectangular http://www.bthxzw.com/huagangshizhijiaochi.html 
 The Botou Navistar cast material measuring 
 Tel: 13373071795 5664468 Contact: Yu Xin Yue