China has manufactured a carbon fiber metro train, which is significantly lighter and more energy-efficient than traditional trains, according to its developer, CRRC Qingdao Sifang Co., Ltd. #XinhuaNews
China has manufactured a carbon fiber metro train, which is significantly lighter and more energy-efficient than traditional trains, according to its developer, CRRC Qingdao Sifang Co., Ltd. #XinhuaNews