Roller buuxa oo sita NCF taxane ah
Adeegyada kale
Rullallallada cylindricalku waa miisaan culus waxayna ku shaqayn karaan xawaare sare sababtoo ah waxay u adeegsadaan rollers-ka curyaamahooda duuban.Sidaa darteed waxaa loo isticmaali karaa codsiyada ku lug leh radial culus iyo rarista saameynta.