The investment of Changgang should be considered from three respects of technical constituent; High class middle class, and low class products.

Optimization research of the shell nosing mould of long steel pipe;

Based on new technical standards and construction characteristics,an automatic flow production line for long rail welding is set up at the track base of the passenger transport line,and the key technologies are summarized for long rail spark contact welding.

The present paper discusses the necessity to develop long steel rail in the aspects of application and production,the feasibility for Pangang to produce long rail and the scheme to modifythe existing line for long rail production.

This paper expounds the structure of lifting implement which is especially used for lifting long rails of hundred meters.

This paper by means of thermal simulation test,studies setting of heating and cooling parameters of full length rail quenching technology,properties of full length quenched rail,and effect of rail surface conditions and cooling method on the quality of the full length quenched rail.