FELDSPAR IN LUMPS, FELDSPAR IN POWDER, BROWN FUSED ALUMINA IN LUMPS, SIZED BROWN FUSED ALUMINA, WHITE FUSED ALUMINA, SIZED WHITH FUSED ALUMINA, THE ULTRAFINE POWDER OF WHITE FUSED ALUMINA

• 钾片石块、钾片石粉、粽刚玉块、粒度号粽刚玉、白刚玉块、粒度号白刚玉、白刚玉微粉