Trawscoed fort
... that Trawscoed fort was explored using fluxgate gradiometer surveys?
... that <b id="mwyg"><a href="./Trawscoed_fort" id="mwyw" rel="mw:WikiLink" title="Trawscoed fort">Trawscoed fort</a></b> was explored using <a class="mw-redirect" href="./Fluxgate_magnetometer" id="mwzA" rel="mw:WikiLink" title="Fluxgate magnetometer">fluxgate gradiometer</a> surveys?