Use crossed platforms: check measurement reference machine parts flatness, straightness and other geometric tolerances can also be used for grinding parts marking, installation of equipment and other purposes. Testing benchmarks mechanical parts are flat, parallelism, straightness tolerance and other forms can also be used for marking, welding and grinding processing and measuring general parts and precision parts and so on. Crossed platform Material: high-strength cast iron HT200-300 face hardness of HB170-240, after two manual processing (annealing 600 degrees -700 degrees artificial and natural aging 2-3 years) using the precision and stability of the product, wear Good. Crossed platform (dash panel) Size: 200 × 200-2000 × 4000mm (. Customized special specifications according to customers drawings or agreed upon production and processing) crossed platform (dash panel) Accuracy: according to national standard verification procedures , respectively, 0,1,2,3 four grades.