Your browser isn’t supported any longer. Update it to get the very best YouTube practical experience and our most up-to-date options. 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