Fig. 2.
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Top row: Line-of-sight velocities along the major axis position from the H I observations of NGC 1512 (left), NGC 4535 (middle), and NGC 7496 (right). Bottom row: Line-of-sight velocities along the minor axis. The x-axis represents the offset of the galactic center and the y-axis represents the observed velocities with (left) and without (right) subtracting the systemic velocity of the galaxy.
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