Uses in the electric vehicle, the electrically operated bicycle, plate-type and the fork type storage battery car, the industry and mining railroad traction power source.

用于电动车辆、电动自行车、平板式和叉式电瓶车、工矿机车动力电源。

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Splint fixation is an external fixation system, composed of retainer, splint, paper pad and traction. Pressure under retainer is the power source of splint fixation in treatment of fractures.

夹板固定是以固定带、夹板、纸压垫、牵引等装置所组成的局部外固定力学系统，固定带的约束力是夹板固定骨折的动力来源和外载荷。

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Electrified railway's traction load is usually the big consumer for the electric power system, so electrified railway's traction load is the main power quality pollution source.

电气化铁道牵引负荷是大宗的工业用电部门，因此它是电力系统重要的电能污染源。

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