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Mae drws yn ddarn o bren, metal neu arall sy'n agor neu'n cau mynediad i ystafell neu adeilad. Mae rhai drysau'n cael eu cloi gyda chlo neu gliced. Caiff drysau eu canfod mewn canolfuriau neu waliau, mewn ystafelloedd, cypyrddau, cerbydau neu gynwysyddion.
Defnyddir drysau er mwyn:
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