ring n.戒指;环;圈;拳击场;马戏场;帮派n.铃声;钟声;电话;口气v.包围;环绕;形成圈v.打电话;回响;鸣响;按铃;听上去
双语例句
If necessary, the stem and stem seal may be removed from the bonnet by removing the retainer ring and handle and screwing the stem out the under-side of the bonnet. 如果必要的话,阀杆和阀杆密封可能要从阀帽上拆卸下来,要在阀帽的下方先拆卸挡圈和手柄,以及阀座上的螺丝。