W12 series rolling machine with four rollers adopt upper roller rotary mechanical drive, lower roller and sideroller fluctuation hydraulic drive, electric concentrated control operation system.
W12系列四辊卷板机采用上辊旋转机械传动，下辊和侧辊升降液压传动，电气集中控制操作系统。
2
You can either relax on the roller without moving (which opens your chest laterally) or roll gently from side to side to massage the muscles along your spine.
你可以躺在滚筒上不动(这样可以使你的胸腔向两侧打开)，也可以慢慢地滚动，按摩脊柱两侧的肌肉。
3
Now entering my fifth year of living with multiple myeloma, a haematological cancer, I reflect back on a roller-coaster ride of symptoms, treatments and side effects.