Methods: Absolutedensity method by improved LJ culture.
方法：改良罗氏培养基绝对浓度法。
2
It is difficult to detect the absolutedensity of rock by ct image in quantitative analysis of rock damage process in compression.
用CT图像定量分析岩石受力损伤破坏过程的难点，是难以知道岩石内部的绝对密度变化量。
3
The difficulties in adopting hydraulic transport for the converter sludge, which is of great absolutedensity and abrades the equipment, and its countermeasures have been introduced.