... corundum brick 刚玉砖 sintered corundum 烧结刚玉 pulverized corundum 刚玉砂,金刚砂粉...
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...粉 carborundum powder; emery dust; emery powder; powdered carborundum; powedered emery; pulverized corundum 金刚砂粉末 carborundum powder ..
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