Buy a ticket for the standard second-class service and you'll find the beds lined up length-wise along an open carriage.
标准二等服务的卧铺，床位在开放式车厢里排列。
The stub tube fillers generated resistance of water flow. And the resistance increased with the increment of flow rate, the length of packed beds and the proportion of fillers.
短管填料对水流产生阻力，随水流速度、填料床的长度及填料投配率的增加而增大。
The results showed that the reasons for low percentage of maternity beds occupied were as follows: low hospital delivery rate, short average length of stay in hospital and so on.
结果表明，产科床位使用率低的原因有：住院分娩率低、产科平均住院日少、个别地区产科床位有些偏多以及分娩的季节差异。
应用推荐