名词
中文翻译：主设备
同义词：
['main unit', 'main equipment', 'main source', 'primary equipment']
例句：
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1. The main unit of the machine is responsible for controlling the speed and direction of the movement.
机器的主要单元负责控制运动的速度和方向。
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2. Main equipment such as furnaces and kilns are essential for industrial production.
像炉子和窑这样的主要设备对于工业生产至关重要。
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3. The main source of heat in this system comes from the electric motor.
这个系统的主要热源来自电动机。