Your browser isn’t supported any longer. Update it to obtain the best YouTube knowledge and our latest characteristics. Find out more?? d?c lý t??ng ?? l?p ?ng giúp n??c th?i ch?y ?úng t?c ?? ?? vét s?ch thành c?a ?ng là 6.5mm ??n 300 mm. N?u l?p ?ng d?c quá s? d?n ??n nguy c? ch?t l?ng ch?y nhanh. Trong khi ?ó ch?t r?n l?i t?n ??ng ? ph�