NPRNTeitlMath O SafleArchifauDelweddauNPRN33601TeitlCwm Dyli Hydro-Electric Power StationMath O SafleGORSAF BŴER TRYDAN-DŴRArchifau24Delweddau10NPRN800088TeitlElectrical transmission switching house, LlanberisMath O SafleTŶ SWITSIOArchifau6Delweddau5
