NF T20-168*NF ISO 6376:1986 Carbonaceous materials for the production of aluminium. Pitch for electrodes. Determination of content of toluene-insoluble material.
1986NF T20-168*NF ISO 6376:1986 Carbonaceous materials for the production of aluminium. Pitch for electrodes. Determination of content of toluene-insoluble material.