钻石是唯一一种集最高硬度，强折射率和高色散于一体的宝石品种，任何其它宝石品种都是不可比拟的。
Diamond is the only one of the highest hardness sets, strong index of refraction and in the integration of high-dispersive gemstone varieties, are unparalleled in any other gem varieties.
采用隔膜压滤机，棕榈硬脂硬度提高、棕榈液油得率增加，分离效果好。
By employing the membrane filter press, both hardness of the palm stearin and yield of palm olein were enhanced, and higher fractionation efficiency was got.
测试了高导电铬铜合金在各种热处理状态的导电率、 硬度和力学性能，并分析了性能变化及金相组织。
The electrical conductivity, hardness and mechanical properties of Cr Cu alloy in various heat treatment states are tested and its properties and microstructure variations are analyzed.
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