滚动轴承货车
Freight with roller bearing
Roller bearing wagon
货车滚动轴承
Freight car rolling element bearing
货车轮对轴承
railroad truck axlebox bearing
铁路货车滚子轴承
roller bearings for goods train
曲轴轴承轴颈配合面
crankshaft bearing journal surface
货车车底
the underside of the truck
货车车钩缓冲器
wagon coupler and draft gear
货车车号管理系统
freight car number administration system