1.Lub tshuab yog tsim rau batch loj thiab ib qho kev tsim ntawm cylindrical spur thiab helical iav, cab iav thiab sprocket.
2.Lub tshuab yog tus yam ntxwv zoo rigidity, siab zog, siab ua haujlwm raug, thiab yooj yim rau kev khiav lag luam thiab tswj.
3. Lub tshuab tuaj yeem ua haujlwm tsis tsuas yog nrog rau pem hauv ntej thiab rov qab txiav, tab sis kuj nrog axial lossis radial pub.