以下为句子列表：
英文: According to the actual working condition of the electric motor on ground drive screw pump, two kinds of new motors are proposed, that is the gearshift multi-power single speed motor and speed regulating pole change motor.
中文: 摘要根据地面驱动螺杆泵电动机的实际工况，提出了分挡多功率单速和变极调速2种新的电动机设计方案。
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英文: The article presents the principle, basic structure, main features and strike characteristics of new double-strike electric drive screw press.
中文: 介绍了双击式直接电动螺旋压力机的工作原理、基本结构、主要特点及其打击特性。
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