In order to meet the screw air compressor operation of the energy saving, there must be an efficient changespeed motor drive.
为了满足螺杆空压机运行中的节能，必须有一种高效率变转速的驱动电机。
2
Damper is mainly used in automotive and medical equipment, which is characterized by resistance to change with the speed of operation.
阻尼器在汽车和医疗设备上都用得比较多，其特点是阻力随着运行的速度而改变。
3
To understand the effect of the transfusion speed on the cardiac function recovery after operation by comparing the heart rate change between two groups.