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    Nid oes gennych resi chwilio datblygedig. Ychwanegwch un trwy glicio ar y botwm '+ Ychwanegu Rhes'

    Roger's Pit Water Balance, Big Pit Mining Museum

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    1. The water balance from Brynpwllog or Roger's Pit in the Rhymney Valley has been reconstructed at Big Pit Mining Museum (nprn 433).
    B.A.Malaws, RCAHMW, 22 January 2001.