指与有关天然刚玉对比，具有基本相同的物理、光学及化学性能的人造材料。
It refers to artificial material with the basically the same physical, optical and chemical performances as natural boule.
树木呈现同心圆的年轮线，而在天然刚玉晶体中这些生长线是角状的，它们都会有一个形成的中心点。
In trees, these lines are concentric, while in natural crystals, they are angular, but both form from a central point.
本文介绍了天然金刚石、天然刚玉、石榴石、石英、燧石、浮岩、硅藻土、赤铁矿、珍珠岩等天然磨料的性能特点和其应用。
This paper discusses the performance and application of natural abrasive such as diamond, corundum, garnet, quartz, flint, pumice, diatomite, hematite and perlite.
应用推荐