The other is the use of hybrid drive, liquid - gas or electro - hydraulic hybrid drive, only suitable for specific occasions, there is no large-scale use.
其它还有采用混合驱动，即液-气或电-液混合驱动等，只适用于特定场合，没有大规模采用。
2
The feed drive system of a precision cold ring rolling mill adopts AC servo motor and mechanical transmission, rather than conventional electro-hydraulic actuator.
采用交流伺服电机和机械驱动进给系统的冷轧环机，其进给伺服控制系统的设计需要一个新的工艺动力学模型。
3
The actualization method of the direct driveelectro-hydraulic servo system was introduced, and the mathematic model of the system was built.