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随着我国经济的持续高速发展,人民生活水平的不断提高,人们要求更好的乘车环境,列车卧铺车厢随之不断增加。列车的高速化
With the sustained and rapid economic development in our country, the continuous improvement of living standards of the people, the demand for a better riding environment and the increasing number of sleeper train sleepers. High-speed train