速差自控器
速差自控器是在坠落发生时能够由速度变化引发锁止制动作用的装置。我们平时也称它为防坠器，顾名思义，其主要功能是防坠落。主要用于高空作业场景。
A speed difference self-controlling device is a device that can trigger locking and braking actions through speed changes when a fall occurs. We usually call it a fall arrester. As the name implies, its main function is to prevent falls. It is mainly used in high-altitude operation scenarios.
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