Barmac grains and ball milling grains are brown corundum grains from different granulating process.
巴马克砂与球磨砂是制粒工艺不同的棕刚玉砂。
The oilstones produced by our company include brown corundum(A), white corundum(WA), black carborundum(C), green carborundum(GC)etc.
我公司生产的油石有棕刚玉（A）、白刚玉（WA）、黑碳化硅（C）、绿碳化硅（GC）等材质。
In the experiment using corundum aggregate, the specimens prepared with high ferric oxide brown corundum aggregate has the highest bulk density and strength.
在使用刚玉骨料的试验中，采用高铁棕刚玉的试样的体积密度和强度均最高。
Made up of the elements aluminum and oxygen, corundum also can be yellow, gray, or brown.
由铝和氧两种元素构成的刚玉，会呈现出黄色、灰色或者棕色。
Made up of the elements aluminum and oxygen, corundum also can be yellow, gray, or brown.
制造的基础是氧化铝，金刚砂可以是：黄色，灰色和棕色。
Made up of the elements aluminum and oxygen, corundum also can be yellow, gray, or brown.
制造的基础是氧化铝，金刚砂可以是：黄色，灰色和棕色。
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