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Fig. 5

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Line intensity ratios change with different radii. The grey lines represent the ratio between two spectra of single stars, and the colourful lines are the ratio between two star components in the binary spectra. The blue lines mean that the 7250 K components are blueshifted in SB2 spectra, and the orange lines mean that the 7250 K components are redshifted. Different line styles stand for different parameter combinations.

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