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There’s a lot of moving parts when it comes to the construction of a bridge. Like, how do you build a bridge without the help of a bridge? The easiest way? This SLJ900 machine. It moves in coordinated parts to deftly erect a bridge or viaduct, balancing its weight on the beams before laying out the groundwork. It’s really cool to see it slide across and pop out.

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via Gizmodo http://ift.tt/1kf5rcu