CONSTITUTED BY A MIX OR COMBINATION OF ALUMINA (AL2O3) SILICA (SIO2) AND ZIRCONIUM OXIDE (ZRO2) WITH AN ALUMIN CONTENT GREATER OR EQUAL TO 45% BUT LESS THAN 90% BY WEIGHT OR WITH A CONTENT OF ZIRCONIUM OXIDE (ZRO2) HIGHER OR EQUAL TO 2
681599140000
CONSTITUTED BY A MIX OR COMBINATION OF ALUMINA (AL2O3) SILICA (SIO2) AND ZIRCONIUM OXIDE (ZRO2) WITH AN ALUMIN CONTENT GREATER OR EQUAL TO 45% BUT LESS THAN 90% BY WEIGHT OR WITH A CONTENT OF ZIRCONIUM OXIDE (ZRO2) HIGHER OR EQUAL TO 2