Analyzing on being right angle of space plane angles projection;

The metal of the right angle isnt enough used of hot rolled equal and unequal angle steel Mean while,the right angle is easy producing stress concentration and difficult rolling Therefore,the section of angle steel was optimized,and a new section of round arc angle steel is put forward,which can be easily rolled,used and saved metal material over 5

This paper proposed that self-propelling cultivator ought mainly adopt right-angle blades,provided the method to design the geometrical parameters of right-angle blades frontispiece,analyzed the s.

By using these mode-locking devices on novel thin-disk solid state lasers and optically pumped vertical-external-cavity surface-emitting semiconductor lasers(OPS-VECSEL) to obtain high average output power ultrashort pulses are stated,and it is emphasized that the study of high average output power ultrashort pulses laser can be accel.