Óxido de alumina castanho 95%90%80%70%60% Al2O3 a bom preço
Grau A- Al2O3: 95% min
Grau B-Al2O3: 90% mín
Grau C-Al2O3: 80% mín
Grau D-Al2O3: 60% mín
Grau E-Al2O3: 50% mín
Alumina fundida castanha de grau A F#46:
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