I've selected bigger cloning stamp with small hardness — about 15%.
我选择了硬度大与小克隆邮票-约15%。
The sample from the meteorite was far too small to test for hardness, except to show that it is certainly harder than regular diamonds.
如果要检测硬度，陨石的标本就太小，它只能显示出这种物质无疑比一般钻石硬。
Hardness than corundum, abrasive easily broken, sharp edges and corners, good cutting, grinding heat and small.
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。
应用推荐