结果表明，施加水再压缩对提高等离子弧柱的能量密度和稳定性、进而提高陶瓷件切割质量非常有效。
It is shown that the water constriction is effective on improving the energy density and stability of the arc, so the cutting quality can be improved also.
实测硬质合金刀片的密度和硬度值是一种判断刀片成分真实含量和性能质量指标的有效方法之一。
The measurement of density and hardness of carbide tips is one of effective method to judge the real compositions of carbide tip and index of performance quality.
用热场动力学方法计算了核物质中核子有效质量随密度的变化关系。
By means of the thermo field dynamics, the change of nucleon effective mass in nuclear matter with density is discussed.
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