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    Measured plan and section view showing the top of the tramway incline at Graig Merthyr Colliery, produced by C.W. Green, 2006.Opsiynau lawrlwytho a prynu
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    NPRNTeitlMath O SafleArchifauDelweddauNPRN406353TeitlGraig Merthyr Railway Incline Summit, Cwm Clydach RailwayMath O SafleRHEILFFORDDArchifau6Delweddau5