批改

1) in general, rail transport is the transport of passengers and goods by train 2) the construction of the railway is often promoted only after the survey is completed the entire route 3) clearly, Vietnam railways connecting residential areas to the center of culture, agriculture and industry 4) Vietnam railways today are using the ray suffering: suffering rails 1000 mm, 1435 mm (standard ray) 5) Recent Vietnam railway sleepers used precast and prestressed concrete to upgrade the rail system