step change

中文翻译有级变速，阶段变速

同义词释义

1)step change,有级变速，阶段变速

2)step speed,有级变速

3)stepped transmission case,有级变速箱

4)stepped speed variation,有级变速系统

5)step transmission,有级变速传动

6)range transmission,有级式变速箱

This paper deals with the theoretic design pr ocess, methods and procedures of machine tools' step speed drive system.

阐述了机床有级变速传动系统的理论设计过程与设计方法,简要介绍了其设计步骤。