obturator ring

• 闭塞环,活塞环

obturator ring的用法和样例：

例句

1. This occurs especially during ring reversal.
   这种情况尤其发生在活塞环倒向期间。
2. The unrestrained piston ring curve has been analyzed by the finite element method.
   摘要引入有限元法对活塞环自由状态曲线进行了分析研究。