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(a) 3D view of two typical tidemark surfaces with a small and large waviness index (SWa = 50.4μm and SWa = 178μm, respectively). (b) 3D view of two typical tidemark surfaces with a small and large roughness index (SRa = 22 μm and SRa = 36μm, respectively). A scale color bar in unit of mm is shown for the height mapping.
