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(a) Front view of solid structure. (b) Top view of solid structure. (c) Hollow trigeminal vascular structure model. (d) Schematic diagram of extrusion printing. (e) A shape view of the hollow, trigeminal vascular structure with a heating plate. (f) Front view of the hollow trigeminal vascular structure. (g) Top view of the hollow trigeminal vascular structure. (h) Bottom view of the hollow trigeminal vascular structure.
