H I line profiles of (U)LIRGs.The arrow in the plot indicates the systemic velocity. For the interferometric array, the H I line profiles are produced within a circular region of approximately 10"×10", centered around the nuclei center of these galaxies, as illustrated in Fig. B.4. Exceptionally, in the cases of IRAS F00163-1039 and IRAS F13373+0105, each possessing two nuclei, the line profiles are generated from the south and southeast nuclei of the two sources, respectively. The references for the single-dish line profiles can be found in Table B.3.