rollera轧辊
rollern.滚筒;滚轴;滚转机;巨浪
roller cone bit牙轮钻头
Roller guideway滚柱导轨
roller cleaning滚筒清理
roller riddling滚轴筛
Roller Pressure罗拉加压
roller transfer滚动传送
roller end wear滚子端面磨损
roller agitator转筒式搅拌机
roller-hearthn.辊道炉床;滚道炉膛
roller analysis滚柱分析