Motor controller for up-down stage automatically, double red light for focusing, multi-humanized design.
电动升降，双红光对焦，多项人性化设计。
When the dynamic force produced by a single motor is insufficient, the mode of multi-stage relay can be taken.
如单个电机所产生的动力不足，可以采取多级接力方式。
The pump consists of prime motor, multi stage centrifugal pump, seat, wire and control, in which the key part is the prime motor.
它由电念头、多级离心泵、底座、电缆和节制屏构成，个中电念头是该系统的要害部件。
The pump consists of prime motor, multi stage centrifugal pump, seat, wire and control, in which the key part is the prime motor.
它由电念头、多级离心泵、底座、电缆和节制屏构成，个中电念头是该系统的要害部件。
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