95%90%80%70%60% Al2O3 브라운 알루미나 산화물 좋은 가격
A등급- Al2O3: 95%min
B등급-Al2O3: 90%min
C등급-Al2O3: 80%min
D등급-Al2O3: 60%min
E등급-Al2O3: 50%min
A등급 갈색 융합 알루미나 F#46:
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