Readings demonstrate the effective voltage depending on the standard price of samples above a whole number of intervals of the basic frequencyCa?ch ?ô?i ve? tru?ng th???ng x? s? mi?n Nam an toa?n nhâ?t chi?nh la? b?n hãy mang t?? ve? sô? ?o? ?ê?n t?i tru? s?? cu?a nha? ?a?i có ghi trên t? vé s? ho??c ca?c v?n pho?ng chi nha?nh, ban ??i di?n