rollermann.轧钢工(压路机驾驶员)
rollern.滚筒;滚轴;滚转机;巨浪
Roller overrunning clutch滚柱式超越离合器
roller bearing crankshaft滚柱轴承曲轴
roller compacted concrete碾压混凝土
roller bearing rope hoist轮辗绳索起重器
roller outer race assembly无内座圈滚柱轴承
roller hearth furnace unit辊底式固溶处理炉
roller type one way clutch滚柱式单向离合器