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Bridges
REASEARCH PAPER have been around sense the beginning of time. The Ancient Roman engineers used two significant innovations, the cofferdam and cement. The cofferdam is when the put wooden spikes in to the bottom of the river then used watertight clay over the spikes to make a bridge. Now today there are more efficient ways to make a bridge then just out of cement and clay. There are Suspension , Arch , Covered and many more. Suspension have become a very common method of bridge construction in the last century. For example the Brooklyn Bridge, George Washington Bridge, G ....
Word count: 506 - Page count: 2
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