单词	壳面观
释义	壳面观医valve view
随便看	principal strain principal-strain principal strain axis principal strain direction principal strain directions principal strain field principals training principal strain ratio principal stress principal-stress principal stress axes rotation principal stress axis principal stress axis rotation principal stress direction principal stresses principal stress four-parametric criterion principal stress line principal stress method principal stress moment principal stress orientation principal stress plane principal stress ratio principal stress rotation principal stress space principal stress state