Electric Motor / Coolant Pump / Vacuum Pump Motor（ 电机 / 水泵 / 马达 / 真空泵 ）

A coolant pump is a type of pump used to recirculate a coolant, generally a liquid, that is used to transfer heat away from an engine or other device that generates heat as a byproduct of producing energy. 水泵电机能广泛应用于不同领域，除在易燃、易爆或有腐蚀性气体的场合外，如运输、混合、印刷、农业机械和视频处理机中应用外，还可以应用与机床、泵类、鼓风机、压缩机等配套设备。

A stepper motor, also known as step motor or stepping motor, is a brushless DC electric motor that divides a full rotation into a number of equal steps. 步进电机是一种将电脉冲信号转换成相应角位移或线位移的电动机。每输入一个脉冲信号，转子就转动一个角度或前进一步，其输出的角位移或线位移与输入的脉冲数成正比，转速与脉冲频率成正比。因此，步进电动机又称脉冲电动机。

Servomotor is a rotary actuator or linear actuator that allows for precise control of angular or linear position, velocity and acceleration. It consists of a suitable motor coupled to a sensor for position feedback. It also requires a relatively sophisticated controller, often a dedicated module...

A rotary vane vacuum pump enables the compression of air inside the pump chamber to create suction for the removal of air molecules from a vessel or area. 旋片式真空泵可以抽除密封容器中的干燥气体，若附有气镇装置，还可以抽除一定量的可凝性气体。但它不适于抽除含氧过高的，对金属有腐蚀性的、对泵油会起化学反应以及含有颗粒尘埃的气体。