Hydraulic calculation and extraction of red leaf air duct are incomplete.

The necessary input data is missing. When using Hongye air duct hydraulic calculation software, there is a lack of necessary input data. Before hydraulic calculation, it is necessary to input some necessary parameters, such as the size, length, air volume, medium density and viscosity of air duct. If any one of the parameters is missing or incorrect, it will lead to the deviation of the calculation results.