It is necessary to apply unitary scale of hardness in practice.
实际应用中使用统一的硬度标度是必要的。
The hardness of all metals samples can be continuously established with the same scale by Vickers hardness test. But the test methods are inefficient.
只有维氏硬度试验可以使所有金属建立起连续一致的维氏硬度标度，但原试验手段效率低。
The performance of synergistic scale inhibition was investigated in different water temperature, magnetic field intensity, water hardness and concentration.
研究了不同温度、磁场强度、水质硬度及加药量下的协同阻垢性能。
Sapphire has a hardness of 9 on the Mohs scale and is also extremely tough.
蓝宝石具有硬度大、9月的层数也非常强硬。
The research status of scale-resistant property of water quality stabilizer BD-5 for low hardness and low alkalinity surface water is presented in this paper.
文章介绍了BD-5水质稳定剂对低硬低碱度地表水的阻垢性能研究情况。
The quantitative scale of the hardness-softness of acids and bases is an important problem yet to be solved in the study of the principles of hard and soft acids and bases.
酸碱软硬度的定量标度是软硬酸碱原则研究中有待解决的重要课题。
The quantitative scale of the hardness-softness of acids and bases is an important problem yet to be solved in the study of the principles of hard and soft acids and bases.
酸碱软硬度的定量标度是软硬酸碱原则研究中有待解决的重要课题。
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