低于-15C°蒸发温度时必须安装附加冷却低于-25C°时蒸发温度时安装喷液系统，可根据需求增加配置

When the evaporation temperature is lower than -15C°, it is necessary to install the spray system when the additional cooling is lower than -25°C. The spray system can be installed according to the demand.