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Beth yw’r gwahaniaeth rhwng pren wedi’i drin a phren heb ei drin?

Beth yw’r gwahaniaeth rhwng pren wedi’i drin a phren heb ei drin?

by Growing Heart | Nov 19, 2022 | Pren

Pam trin pren? Mae pren fel arfer yn cael ei drin i wella ei wydnwch ar gyfer defnydd allanol neu i’w amddiffyn rhag pla pryfaid. Pa mor effeithiol ydy hyn? Dros y blynyddoedd diwethaf mae llawer o’r cemegau triniaeth traddodiadol wedi cael eu hatal...

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  • Beth yw’r gwahaniaeth rhwng pren wedi’i drin a phren heb ei drin?

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