Iimveliso
Iiyunithi ezithwele ibhola yomqamelo ziquka i-insert bear egxunyekwe kwindlu, enokuthi ibotshwe kwindawo yokuxhasa.Olu luhlu lwenzelwe ukujongana nomthwalo ophezulu wokulinganisa kunye nesantya esiphakathi kwaye uvumele ukuchithwa kwe-shaft ngaphandle kokuhambisa ukunyuswa kwezindlu ngokunjalo.