1·I Miki , this is the first phase of treatment, the steel ring set on him after 10 hours will automatically open.
我对美树说，这是第一阶段的疗程，套在他身上的钢环十小时之后会自动打开。
2·Arc rollaway, on which several steel ball are set, is set on convex ball surface of inner ring.
沿内圈的凸形球面上设有两条弧形沟道，在弧形沟道上设有若干钢球。