This paper help develop Steam locomotive repair plant in order to ensure the quality of design and manufacture of special breathing tube cutting and welding allwelder.

By an analysis of resistance change and regulating character of gas exhaust ductwork in the condition of cell-machining,gets the way to regulate the damper at the exit of the cell.

By analyzing the experiment of the draining duct,this paper puts forward the opinion that the draining duct can be added to the guide place of finished detonator,which can promptly drain off the wave produced by the explosion of detonator and greatly enhance the safe production.

Effects of Nutritional Factors on Laccase Production from White Rot Fungi Bjerkandera adusta;

Optimization of Culture Medium for Laccase Production from Bjerkandera adusta by Uniform Design;

Chemical constituents of the aerial parts of Carpesium cernuun;