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SEM images for fabricated multi-layer scaffolds: (A) gird structure scaffold; process parameters are C=70%, V=3 kV, D=3 mm, FR=2 |L/min, SS=250 mm/s, T=25 °C; (B) front view of coiled structure scaffold; process parameters are C=60%, V=3 kV, D=3 mm, FR=2 |L/min, SS=250 mm/s, T=25 °C; (C) rear view of the coiled structure scaffold.
