Position-velocity (p − v) diagrams of the CO(2−1) emission in NGC 4593, extracted from the data and 3D-BAROLO model along the major (top panel) and minor (bottom panel) axes. Blue solid contours illustrate the p − v diagram derived from the data cube, while red solid contours depict the p − v diagram from the model cube. The contour levels for both data and model are set at [1, 2, 4, 8, 16, 32, 64]×l, with l = 0.0012. In the top panel, yellow solid dots represent the rotation velocity of each ring from the best-fit disc model. The dashed light green circle in the bottom panel highlights the region where a potential gas inflow or outflow is located. These p − v diagrams facilitate the investigation of the spatial and kinematic structure of the CO(2−1) emission in NGC 4593.