It has proven by practice that the two solutions both can implement Variable Frequency Control of ac Motor well, and have good applied cost.
实践证明，两种解决方案均能很好地实现交流电机的变频控制，具有良好的应用价值。
It has characteristics of good properties and low cost and was applied in some oilfields with the good effect of water control and oil increment.
该调堵剂具有性能好，成本低的特点，已在一些油田施工应用，取得较好的控水增油效果。
The circuit has good characteristics of widely dynamic range, high sensitivity and low cost by designing generator by self. It has been applied to ECT system.
该电路采用分立元件设计激励信号，降低了系统成本，具有动态测量范围宽、灵敏度高等特点，已成功应用于电容层析成象系统的测量中；
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