overhead power line
2.This product is mainly used for prestressed and post-tensioning technology in large, medium and small sizes of various of PC structures,and widely used for civil engineering construction of large scale railroad,high-way bridges,buildings,truesses,overhead crane beams,industrial and civil prefabricated concrete floor,wall board,trbular piles,power line poles,power line poles,PC water pipes,TV towers and nuclear power station,etc.
4.After expounding the power supply and current collection modes of the rolling stock in Shanghai UMT Pearl Line in terms of technology and economy, the author argues that two current collection modes shall be adopted for Shanghai UMT Pearl Line, i.e. a third rail collector be on skybridge while the overhead contact line on the ground.
