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Cerdded y Llinell
Iolo Williams a Hywel Teifi Edwards sy'n cerdded ar hyd cadwyn ffosydd y Rhyfel Byd Cyntaf. Iolo Williams and Hywel Teifi Edwards walk along the trenches of the Great War.
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鈥橠yw鈥檙 rhaglen yma ddim ar gael ar 91热爆 iPlayer ar hyn o bryd
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