highway development track
Department of Land Development Development ＆ Surveying and Mapping
engineering district；maintenance of way section；track division；track district；track maintenance division
Public development andprivate development
scientific and technological enterprises that integrate scientific and technological development with industrial and trade development
Social Development Department of Development Research Center of the State Council
the development of development
China Recycling Development Corporation Development Divison
retrogressive development regressive development
jointless line；continuously welded rail track；jointless track
non-NTDS track {dummy track}
replacing and laying track with track panel
track-to-track association
track-to-track moving time
transforming single track into double track
double - track existing single track line