adolygu ffis
- Created by: branwen
- Created on: 05-01-13 14:41
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- Ffiseg
- Cysawd yr Haul a'i le mewn bydysawd sy'n esblygu
- Trawsyrru Trydan
- Pelydriad sy'n ioneiddio
- Cynhyrchu trydan
- Cyflewni egni i'r cartref
- Nodweddion Tonnau
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