1. the domestic refuse received safe treatment and disposal. On the other hand, the number of the autobus and trolley bus reached 13,000 and the total length of rail transportation increased to 54 kilometers. 
   2001年城市污水处理率达到42%，生活垃圾无害化处理能力达到清运量的85%，公共电汽车发展到1.3万辆，城市轨道交通运行线路达到54公里。
2. I want a trolley. 
   我需要一个手推车。
3. Looking at the trolley. 
   看着甜点车
4. continuous welded rail track 
   无缝线路
5. expansion joint of rail 
   钢轨伸缩调节器

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• 1. 轨道自动车
  rail trimming machine 钢轨研磨平整机...rail trolley 轨道自动车...rail tunnel 铁路隧道
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