始新统—渐新统界线全球变冷事件
Eocene-Oligocene boundary global cooling event
可变冷媒流量
variable refrigerant volume
焊接连续转变冷却曲线
continuous cooling transformation curves
变冷水温
variable chilled water temperature
变冷媒流量多联机
variable refrigeration volume system
变冷冻水温
variable chilled water temperature