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Mae鈥檔 ddrwg gennym 鈥榙yw鈥檙 bennod yma ddim ar gael ar hyn o bryd

Darganfyddir bod Cigfoch yn gallu cynhyrchu 'haearn groncyl' sef metel eithriadol o gryf ond ysgafn iawn. Cigfoch begins producing a type of iron more powerful than anything seen before.

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