为了节约能源，当制冷系统采用水冷冷冻水机组+自由冷却系统时，有制冷、预冷、自由冷却三种运行模式。

In order to save energy, when refrigeration system using water frozen water units + free cooling system, have refrigeration, precooling, free cooling three operating mode.

youdao

为了节约能源，当制冷系统采用水冷冷冻水机组+自由冷却系统时，有制冷、预冷、自由冷却三种运行模式。

In order to save energy, when refrigeration system using water frozen water units + free cooling system, have refrigeration, precooling, free cooling three operating mode.

youdao