求翻译：8.2 该项目在安装中使用冷冻式干燥机对气体进行干燥，有可能气体的洁净度不能满足要求，可能要增加吸附式干燥机，这样会大大增加投资成本。是什么意思？

8.2 the project using the install freeze-dryer to dry gas, gas cleanliness may not meet the requirements, you may want to increase the absorption dryer, this will greatly increase the investment costs.