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    Manylion
    Delweddau
    Safleoedd Cysylltiedig
    Archifau Cysylltiedig
    NPRNTeitlMath O SaflePerthynasNPRN527505TeitlMinllyn Slate Quarry, Slate Mine IIIMath O Saflen/aPerthynasConsists ofNPRN527460TeitlMinllyn Slate Quarry, Slate Mill IMath O Saflen/aPerthynasConsists ofNPRN527477TeitlMinllyn Slate Quarry, Spoil Tip IIMath O Saflen/aPerthynasConsists ofNPRN527479TeitlMinllyn Slate Quarry, Inclined Plane Winding House IMath O Saflen/aPerthynasConsists ofNPRN527530TeitlMinllyn Slate Quarry, Reservoir IIMath O Saflen/aPerthynasConsists ofNPRN527464TeitlMinllyn Slate Quarry, WallMath O Saflen/aPerthynasConsists ofNPRN527467TeitlMinllyn Slate Quarry, Chimney StackMath O Saflen/aPerthynasConsists ofNPRN527501TeitlMinllyn Slate Quarry, Inclined Plane Winding House IIMath O Saflen/aPerthynasConsists ofNPRN527486TeitlMinllyn Slate Quarry, Inclined Plane IIIMath O Saflen/aPerthynasConsists ofNPRN527468TeitlMinllyn Slate Quarry, PipelineMath O Saflen/aPerthynasConsists ofNPRN527472TeitlMinllyn Slate Quarry, Quarry IVMath O Saflen/aPerthynasConsists ofNPRN527466TeitlMinllyn Slate Quarry, Engine and Boiler HouseMath O Saflen/aPerthynasConsists ofNPRN527491TeitlMinllyn Slate Quarry, Spoil Tip VMath O Saflen/aPerthynasConsists ofNPRN527485TeitlMinllyn Slate Quarry, Quarry VMath O Saflen/aPerthynasConsists ofNPRN527474TeitlMinllyn Slate Quarry, Inclined Plane IMath O Saflen/aPerthynasConsists ofNPRN527420TeitlLlyn Foel Dinas, BankMath O Saflen/aPerthynasConsists ofNPRN527492TeitlMinllyn Slate Quarry, Slate Mine IMath O Saflen/aPerthynasConsists ofNPRN527490TeitlMinllyn Slate Quarry, Quarry VIMath O Saflen/aPerthynasConsists ofNPRN527475TeitlMinllyn Slate Quarry, Inclined Plane IIMath O Saflen/aPerthynasConsists ofNPRN527462TeitlMinllyn Slate Quarry, Tramway TunnelMath O Saflen/aPerthynasConsists ofNPRN527493TeitlMinllyn Slate Quarry, Spoil Tip VIMath O Saflen/aPerthynasConsists ofNPRN527504TeitlMinllyn Slate Quarry, Slate Mine IIMath O Saflen/aPerthynasConsists of