Wet the fruits and vegetables so they do not become too dry. The best time to do this is before storage. Cover the items in plastic once they reach the right "critical temperature" for storage.
Presents the operating principle of some critical components such as chilled water mixing station, fan filter unit and dry cooling coil.
介绍了冷水混合站、风机过滤器及干盘管等关键设备的运行原理。
3
The "dry" and "wet" critical speeds of multistage centrifugal pump rotor are quite different. The calculated and measured critical speeds are in good agreement.