Цагаан хөнгөн цагааны исэл - Хятад улс Шанхай Bosun …
FEATURES A kind of artificial abrasive.3 oxidation 2 aluminium (Al2O3) content over 98%, and the composition such as containing a small amount of ferric oxide, silicon oxide, appera white. white aluminium oxide a kind of high grade refractories, was made from the …