Tett turret
... that the only exit from a Tett turret could expose a soldier trying to leave the fortification to direct fire from the enemy?
... that the only exit from a <b id="mwEcg"><a href="./Tett_turret" id="mwEck" rel="mw:WikiLink" title="Tett turret">Tett turret</a></b> <i id="mwEco">(pictured)</i> could expose a soldier trying to leave the fortification to direct fire from the enemy?