The flight control system designer is increasingly concerned with the problem of providing adequate stability of the elastic modes of the flight vehicle. The pr
At present many CAD software products did not fully meet the requirements of National Standard 《Technical drafting and Mechanical Drawing》 that greatly affect
Based on long-time research on vocational teaching cube theory in graphics education and analyzing on the intellectual structure in the process of reading engin
A brief historical introduction of researches on perspective in ancient China is presented,this paper studied and discussed the perspective theory or Zong Bing