Alias: inspection plate, cast iron inspection plate, precision inspection plate, cast iron precision inspection plate, the test platform, cast iron test platform 

 Inspection plate (test platform) Specifications: 100 × 100-3000 × 6000 (special specifications according to the demand side, drawing production) 

 Inspection plate (test platform) use: apply to a variety of inspection, precision measurement with the reference plane; for machine tools test to measure the baseline; check the dimensional accuracy of parts or shape of the deviation, and tightly crossed in the machinery manufacturing is not to stay the lack of basic tools 

 The accuracy of the test tablet (test platform): performed according to the National Institute of Standards Metrology and Verification were four levels of 0,1,2,3-class 

 Inspection plate (test platform) Material: high-strength cast iron HT200-300 

 Inspection plate (test platform) face hardness: HB170-240 

 Inspection plate (test platform) surface quality inspection: inspection and coloring hair. 0 and a flat 25 mm square within less than 25 points on each side, two at least 20:00, 3 a lot of regulation at 12:00