它主要由多级离心泵、双级分离器、保护器、潜油电机、护罩、沉降分离器组成。
It is comprised of multiple stage centrifugal pump, double stage gas separator, protector, submersible motor, guard shield and setting gas separator.
如单个电机所产生的动力不足，可以采取多级接力方式。
When the dynamic force produced by a single motor is insufficient, the mode of multi-stage relay can be taken.
多级拉拔不但要求每级电机拖动系统满足技术指标，而且要求各级电机之间的速度谐调、匹配。
For multiple stages drawing, drawing system for each motor shall meet technical specification and the speed of the motors shall be matched or coordinated to each other.
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