Rectangular plate bending by JB6092 - 85 standards for manufacturing, materials HT200-HT300, face scraping process used for the detection of parts in the clamping and machining. Angle bending purposes: for inspection of the workpiece 90 ° angle, maintenance of equipment related to the surface of the test components perpendicular degree, also commonly used in the bench marking. and can be used in testing, installation, machine mechanical vertical checks and checks on the cast iron plate in the vertical parts, for high precision machinery and equipment, inspection and machine inspection of verticality between Accuracy: 1, 2, 3. Note: Do not wet bending, corrosion, high and low temperature environments and storage In use for bending the first installation, then, the bending of the face wipe clean, no problem in identifying the circumstances under bending. 
 Specifications measuring vertical face of the base surface of measuring surface flatness or straightness of the base surface flatness or straightness 
 Accuracy class 
 1 2 3 1 3 1 2 3 4 
 200 × 200 8 16 30 4 8 16 6 12 24 
 300 × 200 10 20 40 5 10 20 8 16 30 
 300 × 300 10 20 40 5 10 20 8 16 30 
 400 × 300 12 24 45 6 12 24 10 20 40 
 400 × 400 12 24 45 6 12 24 10 20 40 
 500 × 400 28 50 14 28 24 48 
 500 × 500 28 50 14 28 24 48 
 800 × 600 35 60 18 35 28 55 
 http://www.knzzlj.com/fxwb/zjwbi.html