Cameron Ram-type Blowout Preventer
... that the Cameron Ram-type Blowout Preventer was the first successful blowout preventer for oil wells?
... that the <b id="mwELQ"><a class="mw-redirect" href="./Cameron_Ram-type_Blowout_Preventer_(1922)" id="mwELU" rel="mw:WikiLink" title="Cameron Ram-type Blowout Preventer (1922)">Cameron Ram-type Blowout Preventer</a></b> was the first successful <a href="./Blowout_preventer" id="mwELY" rel="mw:WikiLink" title="Blowout preventer">blowout preventer</a> for <a class="mw-redirect" href="./Oil_wells" id="mwELc" rel="mw:WikiLink" title="Oil wells">oil wells</a>?