硬度高于棕刚玉，磨粒易破碎，棱角锋利，切削性能好，磨削热量小等。

Hardness than corundum, abrasive easily broken, sharp edges and corners, good cutting, grinding heat and small.

youdao

硬度高于棕刚玉，磨粒易破碎，棱角锋利，切削性能好，磨削热量小等。

Hardness than corundum, abrasive easily broken, sharp edges and corners, good cutting, grinding heat and small.

youdao