The performance and feature of melt gear pump in the polymer processing was introduced, and the purpose and characteristic of melt gear pump for plastic and rubber extrusion was listed.

介绍了熔体齿轮泵在聚合物加工中的性能与特点，列举了用于塑料、 橡胶挤出的熔体齿轮泵的用途和特点。

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In the paper, the outside magnetic driving system of blood pump based on single chip AT89S52 is introduced, which has good speed regulation characteristic and control performance.

该文介绍了以单片机at89s52为控制单元的血泵外磁驱动系统，该系统具有良好的调速性能和控制性能。

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Performance characteristic and stress condition were analyzed in the process of progressive cavity pump well startup and a startup torque dynamic model was established.

对启动过程中单螺杆泵的运动特点和受力情况进行分析，建立了该系统启动扭矩动力学模型。

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