In areas of poor power condition, where it's difficult to get an alternative power to supply class 1 load, an emergency power is required.
在供电条件比较差的地区，取得第二个电源供给一级负荷有困难时，也需要增设应急备用电源。
Cable pulley is an ideal power supply logistics system, suitable for indoor and outdoor, dust, dust, temperature difference, poor environment, stable operation of the power supply system.
电缆滑车是一种理想的物流供电系统，适用于室内外、多尘、多灰、温差较大、环境较差，要求运行平稳的供电系统。
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