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    Manylion
    Hierarchaeth
    Safleoedd Cysylltiedig
    NPRNTeitlMath O SafleArchifauDelweddauNPRN421620TeitlSugarloaf Railway Tunnel, Central Wales Line or Heart of Wales LineMath O SafleTWNNEL RHEILFFORDDArchifau2Delweddau2