研究发现，随着复合材料中石墨含量的增多，材料的相对密度、布氏硬度值降低，电阻率升高。
The results showed that the relative density and Brinell hardness decreased while the electrical resistivity increased with the increase of graphite content.
因此，对于高硬度，布氏硬度计和维氏硬度计或洛氏硬度计的检测值之间的关系就会受到所采用的球体的影响。
At high hardness, therefore, the relationship between Brinell and Vickers or Rockwell scales is affected by the type of ball used.
该系统可自动测试转向器齿条的里氏硬度，可转换成相应的洛氏、布氏、维氏值，并按生产要求自动进行分选。
The system can automatically measure Riss hardness of steering gear rack, and then transform it into corresponding Rockwell, Brinell and Vickers hardness.
该系统可自动测试转向器齿条的里氏硬度，可转换成相应的洛氏、布氏、维氏值，并按生产要求自动进行分选。
The system can automatically measure Riss hardness of steering gear rack, and then transform it into corresponding Rockwell, Brinell and Vickers hardness.
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