rollera轧辊
rollern.滚筒;滚轴;滚转机;巨浪
roller covering包皮辊
roller actuator转子开关
roller follower随动滚柱,滚轮挺杆,滚轮从动杆,滚子从动件
Roller's nuclei
roller standard滚柱架
roller-bladesn.直排轮式溜冰鞋
roller- style铺卷机构
roller expander滚子扩张器
roller grinding滚子磨削
roller and tyre托轮滚圈