安装，更换和修复照明灯具和电气控制及配电设备，如开关，继电器和断路器面板。
Install, replace and repair lighting fixtures and electrical control and distribution equipment, such as switches, relays and circuit breaker panels.
安装，更换和修复照明灯具和电气控制及配电设备，如开关，继电器和断路器面板。
Install, replace and repair lighting fixtures and electrical control and distribution equipment, such as switches, relays and circuit breaker panels.
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