Hoʻopuka Huahana: 1, ʻO Junda chrome corundum ka alumina pauka ma ke ʻano he kumu waiwai nui, hoʻololi i ka chromium oxide, hoʻoheheʻe ʻia e ka umu ahi arc kiʻekiʻe.2, ʻulaʻula ka waihoʻoluʻu, paʻakikī a me ka corundum keʻokeʻo like, ʻoi aku ka paʻakikī ma mua o ka corundum keʻokeʻo.ʻO nā abrasive i hana ʻia he ʻano ...
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