短語詞組短語Dissolved Oxygen concentration Control 溶解氧濃度控制minimum dissolved oxygen concentration 最低溶解氧濃度dissolved oxygen concentration deficit 溶解氧飽和差critical dissolved oxygen concentration 臨界溶氧濃度dissolved oxygen do concentration 溶解氧濃度mixed liquor dissolved oxygen concentration 混合液溶解氧濃度 返回 dissolved oxygen concentration