Several years ago, Britain and France wanted to connect the two together. The Channel Tunnel This is a challenge for the British and French engineers. The tunnel has a length of 50 kilometers, the longest in the world that would also be safe. Underwater tunnel may be an accident. So engineers are building the tunnel exit, the three two-way for the train. And one for the emergency exit. Engineers, the teams compete in both the tunnel to the central point. They use a large tool, which can be mined by open tunnel 75 meters per day in 1994, nearly 13,000 people who helped build the tunnel. A speed of about 160 sq Lome per hour. It takes only 20 minutes!
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