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When the Higgs portal is closed and $y_{ST}$ is perturbative $ (\\lesssim 1)$, $TS\\to (W^+b, gt)$, $SS\\to t\\bar{t}$ and $T\\bar{T}\\to (q\\bar{q},gg)$ provide the dominant (co)annihilation contributions to obtain $\\Omega_{\\rm DM} h^2\\simeq 0.12$ in light, medium and heavy DM mass range, respectively. 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When the Higgs portal is closed and $y_{ST}$ is perturbative $ (\\lesssim 1)$, $TS\\to (W^+b, gt)$, $SS\\to t\\bar{t}$ and $T\\bar{T}\\to (q\\bar{q},gg)$ provide the dominant (co)annihilation contributions to obtain $\\Omega_{\\rm DM} h^2\\simeq 0.12$ in light, medium and heavy DM mass range, respectively. 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