名词中文翻译
中文翻译：信号杆
同义词：
['signal post', 'signal pole']
例句：
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1.The semaphore shaft was used to signal the approach of a ship.
信号杆用于指示船只的到来。
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2. The engineer inspected the semaphore shaft before starting the new project.
工程师在开始新项目之前检查了信号杆。
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3. The semaphore shaft was a crucial part of the communication system in the old town.
信号杆是老城区通信系统的关键部分。