It is necessary to apply unitary scaleofhardness in practice.
实际应用中使用统一的硬度标度是必要的。
2
The hardnessof 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。
3
The performance of synergistic scale inhibition was investigated in different water temperature, magnetic field intensity, water hardness and concentration.