支重轮轴夹紧螺栓
roller shaft clamping bolt
支重轮轴橡皮圈
supporting wheel shaft rubber band
履带支重轮架轴承
track roller frame bearing
支重轮架和枢轴
roller frame and pivot shaft
链耙引导轮支重轮
elevator idler support roller
单凸缘履带支重轮
single flange track roller
链轮轴支座轴承
sprocket shaft support bearing