减少径流流失
reducing lose of surface runoff
有机氮径流流失
organic nitrogen loss by runoff
喷淋旋流板塔
cascade spinning-board tower
四溢流塔板
four-pass distillation tray
微涡流塔板澄清器
settler with micro-vorter tower tray
旋流板塔
rotating-stream-tray scrubber
rotating-absorber
Rotating-stream tray scrubber
rotating-stream-tray