... temperature multi-fan type高温多机型:FGBLD-200, 300,400,500,600 二、Low temperature reducing type, 低温降DFN series,降5或8度 1. square counter ... reducing industrial type中高温降, GFN series,降10或20度 1. square counter flow water pond free type:GFNL-75, 100,150,200 ... t2=35℃五、introduction for symbols: (Ⅱ)---mid-temperature type; F---square counter current;方形 G--- high-temperature type;高温,工业型 J---water collecting type;集水型 ...