黄一色片一网站一,xxxx69成人在线观看,久久爱www高清免费人,久久黄色影院,欧洲成人在线视频,淫色成人毛片网,曰中韩一级毛片在线观看

Product description

　　Large railway maintenance machines have tamping machine, rail grinding car, truck, rail slope shaping dynamic stability of vehicle, ballast regulator ballast, ballast changing machine, material transport vehicle, turnout cleaning machine etc..
Tamping machine: special gasoline engine as power for tamping, crushing, tamping, tamping, splitting, drilling and other work, widely used in railway, highway maintenance and maintenance.
　　Rail grinding vehicle: mainly used to eliminate preventive corrugation, abrasion and stripping of rail damage and new rail grinding, can greatly improve the utilization rate of rail, prolong the service life, improve the degree of comfort of passenger train is effective, necessary equipment of high-speed rail maintenance in china.
　　Slope shaping car: the large equipment for the automatic finishing of the bed.