Doppler velocity spectra integrated over three intervals of position angles and four intervals of R. The lines and position angle intervals are indicated on top of each panel. R intervals are 0 to 0.2 arcsec (black), 0.2 to 0.4 arcsec (red), 0.4 to 0.6 arcsec (blue), and 0.6 to 0.8 arcsec (green). In each panel, the upper part shows the line profiles in logarithmic scale and the lower part shows them in linear scale.