名词
中文翻译：主电路开关
同义词：
['main switch', 'main switchboard', 'main breaker']
例句：
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1. The main circuitswitch is located in the control room.
主电路开关位于控制室。
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2. Main circuit switches are used to protect the electrical system from damage.
主电路开关用于保护电气系统免受损坏。
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3. The technicians were instructed to replace the main circuit switch immediately.
技术人员被指示立即更换主电路开关。