Toi chang biet gia cong nhan o my la bao nhieu ?
nhung 1 cai dien thoai hang hieu tri gia gan ca 1000 Do
neu doan thoi gian san xuat ra 1 chiec dien thoai thi chang can nhieu thoi gian
cac chi phi cho nhan hieu ???
linh kien dien tu thi rat re ...
chi phi cho thiet ke ???
toi nghi neu san xuat o my cung Hop ly
neu toi noi sai thi cac ban Sua Loi nhe !