Manufacturers are moving toward gearless turbines, however, so that limitation may become moot.
但是制造商们正在努力生产无档的涡轮机，如此一来限制条件就不复存在了。
ABB's delivery includes six complete gearless mill drive systems: two 22 megawatt (MW) systems and four 14 MW systems.
ABB的交付范围包括六套完整的无齿轮磨机驱动系统，两个22兆瓦的系统以及四个14兆瓦的系统。
This paper introduces control of motors by using frequency-transformer, which changes two kinds of speed(faster and slower) into gearless speed regulation.
