NF B40-678-2*NF ISO 12678-2:1997 Refractory products. Measurement of dimensions and external defects of refractory bricks. Part 2 : corner and edge defects and other surface imperfections.
1997NF B40-678-2*NF ISO 12678-2:1997 Refractory products. Measurement of dimensions and external defects of refractory bricks. Part 2 : corner and edge defects and other surface imperfections.