. "Single-screw steamship" . . . "iron screw" . "screw-steamer" . . . "screw steam" . . . "Screw steamer" . . "screw" . . "screw steamship" . "steam screw propulsion" . . . . . . "screw steamer" . . . . . "Screw" . . . "Wooden screw" . "iron screw steam ship" . . . . . . "steam screw" . "Screw steamer" . . . .