This paper presents the new classification of subdivided driving methods of 2-phase hybrid stepping motor. Some driving methods about trackingcurrent control are studied chiefly here.
对二相混合式步进电动机的微步驱动方式提出了不同于传统的新分类，着重研究了电流追踪型的几种驱动方式。
2
For example, a sales tracking application needs to track the current company, sales lead, and sale representative.
例如，某个销售应用程序需要跟踪当前公司、潜在客户和销售代表。
3
Current concentrations of this dominant greenhouse gas have reached 390 parts per million — up from 280 PPM in recent pre-industrial times — and scientists tracking this buildup see no end in sight.