Velocity profiles for the Ne X (panel a), Ne VIII (panel b), Fe XVIII (panel c), O VIII (panel d), Fe X (panel e), and Fe IX (panel f) absorption lines. λ_lab stands for laboratory wavelength. The black symbols represent the observed RGS spectrum data with 1σ uncertainties. The solid orange lines denote the best-fit model with spex. The blue and red lines correspond to the outflowing velocities of WA_H and WA_L, respectively, while the blue and red regions imply their respective 1σ uncertainties.