名词中文翻译
中文翻译：信号臂
同义词：
['signal arm', 'signalling arm']
例句：
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1.The engineer installed the arm semaphore to improve safety during construction.
工程师安装了信号臂装置来提高施工期间的安全性。
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2.The company used the arm semaphore to alert employees of an emergency situation.
公司使用信号臂装置来警告员工紧急情况。
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3.The arm semaphore was a crucial component in the communication system.
信号臂是通信系统的关键组成部分。