在矿石硬度表上，它的硬度为8，这表明刀子不能割开它而它可在石英上划痕。
In the mineral table of hardness, it has a rating of 8, which means that a knife cannot cut it, and that topaz will scratch quartz.
和其他方法主要区别在于该工具使用的数据集是通过地质统计学的方法把大量的矿石硬度特性赋予到整个矿床模型中建立的。
It fundamentally differs from other methods by using as its' data set a geostatistically significant population of hardness data distributed across the mine block model.
主要用途：本机供选矿、化学、水泥、建筑材料等工业部门中破碎和细碎各种中等硬度一下的矿石和岩石之用。
Main purposes: the machine is used to break the ore and rocks whose hardness is below the middle, in the works of industrial departments such as beneficiation, chemical, cement, building materials.
本系列破碎机，适用于破碎中等以上硬度的各种矿石和岩石。
This series crusher applies to crush all kinds of ore and rock over middle hardness.
因此，对衬板材质的要求是：既要求具有很高的表面硬度，以抵抗矿石的凿削与切削，又要求具有很高的强度与韧性，以抵抗冲击载荷。
Therefore, the liner materials should be required to have both very high surface to resist the drilling and cutting of ore and very high strength and toughness to resist impact Lord.
中锰耐磨铸钢属脆性材料，在非强烈冲击条件下使用，是高锰钢耐磨性的2.45倍，适用于破碎中低硬度的矿石。
Medium-magnesium cast steel is brittle and suitable for crushing low or medium hard ores Its abrasion-resistance is 2.45 as high as that of the high-magnesium steel under non-heavy impact conditions.
中国传统所谓的美玉指的是玉石中的软玉，软玉的硬度为6.5，主要由透闪石和阳起石构成，是一种十分珍贵的稀有矿石。
Traditionally, the fine jade in Chinese refers to the soft jade, with a rigidity of only 6.5, which is very precious.
中国传统所谓的美玉指的是玉石中的软玉，软玉的硬度为6.5，主要由透闪石和阳起石构成，是一种十分珍贵的稀有矿石。
Traditionally, the fine jade in Chinese refers to the soft jade, with a rigidity of only 6.5, which is very precious.
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