名词
中文翻译：回缩器
同义词：
['retractor', 'actuator例句：1. The retractor mechanism on the car door is designed to smoothly close it.（汽车门上的回缩机制设计得可以平滑地关闭。）']
例句：
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1. The retractor mechanism on the car door is designed to smoothly close it.
汽车门上的回缩机制设计得可以平滑地关闭。
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2.The actuator in this robotic arm is responsible for moving its joints.
这个机器人手臂中的致动器负责移动其关节。
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3.The retractor actuator was a critical component of the spacecraft's life support system.
回缩器致动器是宇宙飞船生命支持系统的一个重要的组成部分。