... -200, 300,400,500,600 二、Low temperature reducing type, 低温降DFN series,降5或8度 1. square counter flow low noised water pond ... ,500,600,750,900,1050三、Mid & high temperature reducing industrial type中高温降, GFN series,降10或20度 1. square counter flow water pond free ... ,250,300,400,500,600,700 3. square counter flow industrial deep water pond type:GFNLGP-75, 100,150,200,250 ...