With the continuous development of the length of the highway and road between cities , the number of high-level sleeper buses and trains berth comparts is also rise .
随着高速公路通车里程和城市间道路的不断增长以及铁路客运的高速发展，对高档公路卧铺客车和铁路卧铺客车铺位的需求增加；
comparts