High torque at low RPM levels which improves its ability to operate under heavy loads without stalling.

高扭矩低转速的水平，从而提高其能力在重负载下运行，没有拖延。

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The results show that stalling torque increases and no load speed decreases with the increase of the pre-load and degree of vacuum.

结果表明，随着预紧力和真空度的增加，马达的堵转力矩增加而空载转速下降；

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