Vay ne may bac.binh thuog thi ming bam mot lan la no len lun phai ko,nhung day phai bam nhap lien tuc,giong bi ket do may bac.con bam xg thi lai ok.con nhu vay nua ne may bac co khi minh bam 1 cai no len xong lai xg lun chu ko binh thg nhu may xe khac.