Fig. 4.

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Spectra from 3800 to 9000 Å of the dLHdC stars we consider as cold, Teff ≤ 5500 K. The elements related to the more prominent absorption lines and the expected position of Hα are indicated with vertical dashed lines, as are various band heads of C2 and CN. The gaps in the spectra corresponding to telluric lines are indicated with a crossed circle. The names of the corresponding stars are given on the right side. The ordinate is arbitrary.
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