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We present a detailed angle-resolved photoemission study with $s$- and $p$-polarized light along three different symmetry lines. The Dirac-cone-like feature appears along $\\bar{\\Gamma}\\bar{H}$ and $\\bar{\\Gamma}\\bar{S}$, while it is strongly deformed along $\\bar{\\Gamma}\\bar{N}$. A two-fold $\\Sigma_{3}$ symmetry of the $d$-type surface state is identified from photoemission experiments using linear polarized light. 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