Minh b?ch là m?t trong nh?ng ?u ?i?m n?i b?t c?a các ch??ng trình khuy?n mãi OK9, mang ??n cho ng??i ch?i nhi?u l?i ích nh? sau:The Farnsworth velocity adjusts the Area involving letters and words and phrases, rendering it much easier to understand Morse. It should be a decreased benefit in comparison to the speed.H??ng d?n ??ng ký H??ng d?n