The electro-hydraulic proportional control valve uses the proven force feed-backsystem for improved hysteresis, repeatability, and response.
电液比例控制阀使用的证明力反馈改善滞后性，重复性系统和响应。
2
The model test tried on this system did not use the tachometer generator but used rotor electromotive force instead to form the speed negative feed-backsystem.
本绕线式电动机转子电路脉冲调速系统模拟试验，省去了测速发电机，而利用转子电势组成速度负反馈系统。
3
You may also look forward – look for the issues or questions that you know will feed the next inquiry – and feed them back into the system.