Nhanganyaya yeChigadzirwa: 1, Junda chrome corundum ihupfu hwealumina sechigadzirwa chikuru, chinoenderana nechromium oxide, chinonyungudutswa nechoto che arc chinodziya zvakanyanya. 2, ruvara rwacho rwakaita sepingi, kuomarara uye corundum chena zvakafanana, kuomarara kwacho kwakakwira kupfuura corundum chena. Ma abrasives anogadzirwa ane hunhu...
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