... light-current relay 弱电继电器 light-current system 弱电系统，弱电控制系统 light dependent resistor 光敏电阻器 ...
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light current system projects 弱电系统工程
General Contractor for Light-current System 弱电总包
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The ground connection of the light current system, mainly working grounding, aims to prevent electromagnetic noise and assures the equipment to work steadily and reliably.
弱电系统的接地以工作接地为主，目的是为了防止电磁干扰，保证弱电系统中设备稳定、可靠工作。
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