In the Chinese city of Nanjing, a well-traveled bridge was deemed unsafe - namely, its railings weren't stable enough. According to Li Jin, Chairman of Nanjing Jiayi Precision Machinery Manufacturing Co., Ltd, replacing the railings using traditional means would have taken at least a month. If you've had to deal with bridge construction on any of your usual routes, you're well aware of what a headache it can be - and how it can seem to drag on forever, disrupting traffic for months at a time. Luckily, the residents of Nanjing didn't have to deal with that kind of inconvenience, as Nanjing Jiayi Precision Machinery Manufacturing used 3D printing technology to construct the railings in about two weeks' time. Read more at 3DPrint.com: http://3dprint.com/184852/bridge-3d-...ailings-china/