vsg voltage ສູງສຸດໃນ Indoor Voltage Vermuum Circuit Circuit ແມ່ນໃຊ້ສໍາລັບ 40.5KV Element System Spik order, ເປັນອຸປະກອນຕາຂ່າຍໄຟຟ້າ, ວິສາຫະກິດປ້ອງກັນພະລັງງານແລະຄວບຄຸມພະລັງງານ
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