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2. Swing-door operator - Wikipedia

   en.wikipedia.org/wiki/Swing-door_operator

   The operator may or may not include a return spring to close the door in case of power failure while the door is open. Operators are often categorized by the means by which the motor's energy is applied. Electromechanical—the motor uses purely mechanical means to open the door: gears, cams, levers and such. This is the preferred type in the US.

3. Garage door - Wikipedia

   en.wikipedia.org/wiki/Garage_door

   Modern openers have “force settings” that make the door reverse if it encounters too much resistance while closing or opening. Any garage door opener sold in the United States after 1992 requires safety eyes—sensors that prevent the door from closing if obstructed. Force settings should cause a door to stop or reverse on encountering more ...

4. Drawbridge - Wikipedia

   en.wikipedia.org/wiki/Drawbridge

   Animation showing the operation of a drawbridge. A drawbridge or draw-bridge is a type of moveable bridge typically at the entrance to a castle or tower surrounded by a moat.In some forms of English, including American English, the word drawbridge commonly refers to all types of moveable bridges, such as bascule bridges, vertical-lift bridges and swing bridges, but this article concerns the ...

5. USA falls to Finland: World juniors hockey 2025 schedule, how ...

   www.aol.com/usa-looks-defend-world-juniors...

   12 James Hagens, Boston College. 17 Danny Nelson, Notre Dame* 19 Trevor Connelly, Providence College. 20 Joey Willis, Saginaw Spirit. 22 Max Plante, Minnesota Duluth.

6. Swing bridge - Wikipedia

   en.wikipedia.org/wiki/Swing_bridge

   A swing bridge (or swing span bridge) is a movable bridge that can be rotated horizontally around a vertical axis. It has as its primary structural support a vertical locating pin and support ring, usually at or near to its center of gravity, about which the swing span (turning span) can then pivot horizontally as shown in the animated illustration to the right.

7. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!