Box type Ligament tablet 
 Box type Ligament iron plate (cast iron platform) are generally made of the reinforcement plate and box type, rectangular, square or round face, cast iron plate (cast iron platform), the work surface can be processed V-shaped, T-shaped, U slots and round holes, long holes, such as the shape of the workpiece. The flatness of the face of the cast iron plate (cast iron platform) is a measure of tablet quality precision indicators. Tablet face flatness tolerance allowed values ??to determine the accurate level of the tablet, you must attach importance to the verification of the flatness of the flat-panel face. The accuracy of the plate flatness test tablet quality assurance. Cast iron plate (cast iron platform) often used as a datum, so the accuracy of its face demanding cast iron plate (cast iron platform) face size is generally larger, which determines the tablet test precision and test technology complexity. Test methods for flat-panel flatness three sides of each other research method 

 More crossed the plate assembly plate test square box 
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