Chidzitiro chepombi chinoumbwa nemudziyo wekunyudza wakavharwa nekamuri yesimbi inodzivirira kupisa.Iyi casing inonyanya kushandiswa kuvharidzira kudzivirira kurasikirwa kwekupisa muhurongwa hwekutenderera.Kurasikirwa nekupisa hakusi chete kusashanda maererano nekushandiswa kwesimba asi kunokonzeresa kusakosha kwekushandisa mari.