以下为句子列表：
英文: This unit can be used in two-speed applications or where bi-directional rotation is used to transmit power.
中文: 此机种使用于2段变速组合，正反转组合动力传达分配。
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英文: To reduce parasitic power consumption, some systems use the low speed of a two-speed fan.
中文: 为了减少寄生能量消耗，一些系统运用双速风扇的低速。
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英文: With high mechanical indexes,JFO3 series motor is of enclosed,self-cooling type,suitable for textile machines of cotton,wool,linen and silk in the working conditions of plentiful dust,short fibers,high temperature and high humidity.Its two-speed motor is
中文: 本系列电动机为封闭自扇冷式，具有较高的力能指标，适用于棉、毛、麻、丝等纺织机械，适宜在多尘埃、短纤维、温湿度较高的环境中工作，其双速电动机主要为细纱机设计配套。
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