Soo-rogid, sida habka goynta birta ee caadiga ah, ayaa si ballaaran loo isticmaalaa goobta wax soo saarka mishiinka. Waxaa inta badan loo isticmaalaa habaynta qaybaha birta simmetrically wareeg ah, sida shafts, marsho, dunta, iwm. Geeddi-socodka jeestay waa adag, laakiin iyada oo loo marayo desi macquul ah.
Sii akhri