Cast iron calibration plate 1000x630 2 accuracy class mechanical machining Cast iron calibration plate 2000x1000 3 accuracy class mechanical machining Cast iron calibration plate 400x400 of accuracy class 2 machining Cast iron calibration plate 400x400 1 accuracy class mechanical machining Cast iron calibration plate 1000x630 1 accuracy class mechanical machining Cast iron calibration plate of accuracy class 2 mechanical machining Cast iron calibration plate 250*250 0 accuracy class machining Cast iron calibration plate 1000x630 3 accuracy class mechanical machining Cast iron calibration plate 400*400 0 accuracy class machining Inspection plate cast iron 250x250 3 accuracy class mechanical machining Cast iron calibration plate 2000x1000 2 accuracy class mechanical machining 1600x1000 cast iron calibration plate of accuracy class 3 mechanical machining 1600x1000 cast iron calibration plate 0 accuracy class machining Cast iron calibration plate 2000*1000 0 accuracy class machining Cast iron calibration plate 630*400 0 accuracy class machining Cast iron calibration plate 630x400 2 accuracy class mechanical machining Cast iron calibration plate 630x400 3 accuracy class machining