Granite slab with: high precision, does not rust, acid and alkali, is not magnetized, the same type, good wear resistance, etc. Granite slab in a heavy-duty and general temperature remains stable. I produced the flat granite precision measuring tools, the use of high-quality natural granite slab material by machining, manual refinements made. 
 Granite slab http://www.bthxzw.com/huagangshipingban.html 
 The granite slab: is made of natural stone materials with precision reference measurement tools, test instruments, precision tools, machinery parts, is the ideal plane, granite slab especially for high-precision the measurement. The granite slab is based on the underground quality of the rock layer, after millions of years of natural aging, the shape is extremely stable, and do not have to worry about the occurrence of deformation due to regular temperature difference. Granite slab through rigorous physical testing and selection of granite materials, crystallization of fine, hard texture. The granite of non-metallic material, no magnetic response, and no plastic deformation. Granite slab, high hardness, and therefore to maintain good accuracy. Granite slab features superior to the precision measurement of high-quality cast iron and steel production base parts, to obtain high and stable accuracy. Our company produces 1000 × 630mm '00 'grade granite slab, resting place for a year to maintain the original accuracy of the same. 
 Granite slab 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. 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. 
 3, no scratches, not a constant temperature to prevent temperature measurement accuracy can be maintained at room temperature. 
 4, magnetization measurements can move smoothly, Zhise sense, free from damp impact, the plane weighed. 
 Granite slab http://www.bthxzw.com/huagangshipingban.html 
 The Botou Navistar cast material measuring 
 Tel: 5664468 13373071795 
 Contact: Xin Yue