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Flow passages of the inhalers implementing different designs for aerosol deaggregation. The inhaler numbers (Table 1) and descriptions are: (a) Inhaler 1 - constricted tube, (b) Inhaler 2 - internal impaction surface, (c) Inhaler 3 - 2D mesh of 0.5 mm wires, (d) Inhaler 4 - inward facing 0.5 mm jets, (e) Inhaler 5 - 3D grid of 0.5 mm rods, (f) Inhaler 6 - 3D array of 0.5 mm rods.
