This paper describes the economic and technological benefits of installing continuous welded rail(CWR) track on sharp(radius ≤ 300 m) railway curves. A new for
In this study,the characteristics and changing trends of temperature,precipitation,and runoff in the upper Yellow River basin up Tangnag station are analyzed by
Understanding how the transpiration of this vegetation type responds to environmental stress is important for determining the wa-ter-balance dynamics of the rip