Transportation:Technology Starters——Bridging the Gap
The whole world needs bridges. There are small bridges for foot passengers, flyovers for bueses and railroad bridges for trains. Some big cities have many bridges because they are built on both sides of the rivers. The cities stretch along the river banks as they develop. Bridges become the ligament of both banks. Bridges of early time are very simple. Engineers have always been trying to build new bridges.
- Added：2006
- Country：Germany
- Duration：15
- Time of update：2011/3/11 15:03:55