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The mode of the distribution of the Doppler parameters for the \\lya~lines is $\\simeq 25$ \\kms. The fraction of lines with $10<b<20$ \\kms~is 17\\%. The Doppler values derived from uncontaminated \\lyb~lines are smaller than those obtained from the corresponding Ly$\\alpha$ lines, indicating the contribution of non saturated, non resolved components in the \\lya~profiles. 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