Base plate, the basic platform use: cast iron platform for a variety of inspection, precision measurement of the reference plane, mechanical testing benchmarks for machine tools, inspection parts dimensional accuracy or disruptive behavior, and make precision crossed, in the machinery manufacturing is an indispensable basic tool. Cast iron platform materials and processing: the basic platform for high-strength cast iron material HT200-300, face hardness of HB170-240, after two manual processing (annealing 600 degrees -700 degrees artificial and natural aging 2-3 years) to make the product accuracy and stability, good wear resistance.