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movable bridge
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Tower Bridge double-leaf drawbridge Chicago: Wabash Avenue Bridge Portugalete, Spain swing bridge
The vidoe thumbnail image shows a two-sided bridge lifting and separating at the center. A blue circle highlights the open section.
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movable bridge: Media

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https://www.britannica.com/technology/movable-bridge/images-videos

Videos

How these lifting bridges actually work
Why did the encyclopedia cross the bridge?
Video: Encyclopædia Britannica, Inc.

Images

Tower Bridge
Raising the leaves on the Tower Bridge over the River Thames, London.
Ablestock.com/Thinkstock
double-leaf drawbridge
Chicago's State Street Bridge, an example of a double-leaf drawbridge.
© Chicago Architecture Foundation (A Britannica Publishing Partner)
Chicago: Wabash Avenue Bridge
The Wabash Avenue Bridge, one of several drawbridges spanning the Chicago River in...
© Lissandra Melo/Shutterstock.com
Portugalete, Spain
Vizcaya Bridge, a transporter bridge in Portugalete, Spain.
© BancoFotos/Shutterstock.com
swing bridge
Open swing bridge on Lake Okeechobee in Florida.
FL Stock/Alamy
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