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10 Spectacular Movable Bridges
Posted by Bole982 from www.theworldgeography.com
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A movable bridge is a bridge that moves to allow passage (usually) for boats or barges. An advantage of making bridges moveable is the lower cost, due to the absence of high piers and long approaches. The principal disadvantage is that the traffic on the bridge must be halted when it is opened for passages.
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