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acoustic metamaterial » acoustic metamaterials, acoustic materials, elastic metamaterials
acoustical materials » acoustic materials, optical materials, critical materials
acoustic material » acoustic materials, acoustic metamaterials, plastic material
optical material » optical materials, optimal maternal, optic materials
acoustic metamaterial » acoustic metamaterials, acoustic materials, elastic metamaterials
acoustical materials » acoustic materials, optical materials, critical materials
acoustic material » acoustic materials, acoustic metamaterials, plastic material
optical material » optical materials, optimal maternal, optic materials