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。
2
If the die roller unlocked each die as soon as it was done with a given roll, there would be no problem.
如果投骰子的人只要一投完就马上就释放他拥有的骰子，就不会出现这个问题。
3
The speed reducer upper on the main machine makes central axis rotate through shaft coupling and roller hanger rotates with central axis and rollers on the hanger roll around the inside of ring.