Rollero罗莱罗
rollern.滚筒;滚轴;滚转机;巨浪
roller beater打浆棍
roller system辊系
roller coater辊式涂镀设备
roller tappet滚柱挺杆
roller blinds百叶窗
roller canary金丝雀
roller cutter(锥形)滚刀(隧道掘进机用)
roller failure轧辊失效
Roller nucleus罗勒核
roller ginning皮辊轧棉