... , tunnel, mineral, and power station Specification: 1) DTF(R) series axial fan with 14 sizes (diameter: 1,250mm, 1,400mm, 1,500mm ... ,400mm, 2,500mm, 2,600mm, 2,800mm) and 24 models with different numbers of blades (10pcs, 12pcs, 14pcs, 16pcs) 2) Air ...