Salter's duck
... that Salter's duck is a wave-powered generator that uses gyroscopes to convert up to 90% of wave power into electricity?
... that <b id="mwAT4"><a href="./Salter's_duck" id="mwAT8" rel="mw:WikiLink" title="Salter's duck">Salter's duck</a></b> is a <a href="./Wave_power" id="mwAUA" rel="mw:WikiLink" title="Wave power">wave-powered</a> <a class="mw-redirect" href="./Electrical_generator" id="mwAUE" rel="mw:WikiLink" title="Electrical generator">generator</a> that uses <a href="./Gyroscope" id="mwAUI" rel="mw:WikiLink" title="Gyroscope">gyroscopes</a> to convert up to 90% of wave power into electricity?