名词
中文翻译：主线路开关
同义词：
['primary circuit breaker', 'primary switch例句：1. The primary line switch is responsible for disconnecting the power supply to the building during maintenance.（主线路开关负责在维护期间断开对建筑物的电源供应。）2. The primary line switch is designed to protect the electrical system from faults and overloads.（主线路开关设计用来保护电气系统免受故障和过载的影响。）3. During a power outage', 'the primary line switch is the first line of defense against potential hazards.（在停电时，主线路开关是防止潜在危险的首要防线。）']
例句：
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1. The primary line switch is responsible for disconnecting the power supply to the building during maintenance.
主线路开关负责在维护期间断开对建筑物的电源供应。
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2. The primary line switch is designed to protect the electrical system from faults and overloads.
主线路开关设计用来保护电气系统免受故障和过载的影响。
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3. During a power outage, the primary line switch is the first line of defense against potential hazards.
在停电时，主线路开关是防止潜在危险的首要防线。