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- 作为弱电智能化系统不仅对供电系统要求高,而且对电源系统的防雷也同样要求高。供电电源采取四级电涌保护器(SPD)进行保护-Intelligent system as a weak power supply system requires not only high but also the mine power system is also demanding. Power supply to four SPD (SPD) for protection