abrading stone การใช้

There were 6 " pounding / abrading stones " found, There were 30 specimens classified as " incised stones ", where designs had been incised on their surfaces.
Such abraded stone anvils have been found at numerous Roman silver and gold mines in Western Europe, including at Dolaucothi ( Wales ), and on the Iberian peninsula, where the datable examples are from the 1st and 2nd century AD . At Dolaucothi, these trip-hammers were hydraulic-driven and possibly also at other Roman mining sites, where the large scale use of the hushing and ground sluicing technique meant that large amounts of water were directly available for powering the machines.