城市地下铁路交通,只有上百年历史,经过百年来的经济发展,世界上已经有百座城市兴建了地铁。无须说经济发达国家如纽约、东京、伦敦、巴黎、莫斯科等国际大都市有地铁,就拿仍属发展中国家的我国来说,从上世纪60年代北京开始建地铁,到现在上海、广州、天津也已建成地铁。然而目 Only a hundred years of history have been found in the transportation of urban underground railways. After a hundred years of economic development, there are already 100 subways in the world. Needless to say, the developed countries such as New York, Tokyo, London, Paris, Moscow and other international metropolitan subway, take still developing countries, our country, from the 1960s Beijing began to build the subway, and now Shanghai, Guangzhou, Tianjin has also completed the subway. However, head