piston ring

• n. 活塞环

英英释义

Noun:

1. seal consisting of a split metal ring that seals the gap between a piston and the cylinder wall

例句

用作名词 (n.)

1. These bands are called piston rings.
   这些圈叫做活塞环。
2. This occurs especially during ring reversal.
   这种情况尤其发生在活塞环倒向期间。