求翻译：机床变速机构的性能影响着整个机床的运作，而数控卧式镗铣床的主轴变速机构随着各项技术的发展而变得多样化，利用电机——齿轮实现主轴的无级变速在大、中型数控机床上的应用一直以来是很广泛。所以对电机——齿轮变速机构的设计和分析在数控机床的研究中占有非常重要的地位是什么意思？

The performance of the machine speed change mechanism affects the operation of the entire machine, CNC horizontal boring and milling spindle speed change mechanism with the development of technologies to diversify the use of motor - gear continuously variable spindle in large and medium-sized CNC ma

The machine speed performance affect the whole of the machine and CNC horizontal milling machine spindle boring Shifter with the development of the technology become more diversified, with motor-gear of the spindle for Hydro in large, medium-sized CNC machine tools has been the applications on a wid

The engine bed gearshift mechanism performance is affecting the entire engine bed operation, but the numerical control horizontal type boring milling machine main axle gearshift mechanism becomes along with each technical development diversifies, has realized the main axle stepless speed change sinc

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