Basic principle: Readings exhibit the effective voltage determined by the standard price of samples over a complete range of durations of the elemental frequency?? ng??i ch?i mua X? s? MB ti?n theo dõi l?ch m? th??ng và KQXSM mi?n b?c, Ketqua.tv c?p nh?t l?ch m? th??ng XSKT mi?n b?c chi ti?t hàng ngày nh? sau:Perfect for industrial electrical a