NF B40-678-1*NF ISO 12678-1:1997 Refractory products. Measurement of dimensions and external defects of refractory bricks. Part 1 : dimensions and conformity to drawings.
1997NF B40-678-1*NF ISO 12678-1:1997 Refractory products. Measurement of dimensions and external defects of refractory bricks. Part 1 : dimensions and conformity to drawings.