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Visualization of the characteristics of different chambers. (a) Type-A chamber, with TPU thicknesses of 0.6 mm. (b) Type-B chamber, with TPU thicknesses of 0.6 mm. (c) Type-A chamber, with TPU thicknesses of 1.0 mm. (d) Type-B chamber, with TPU thicknesses of 1.0 mm.
