spring expander oil ring

例句：

1. 1.The spring expander oil ring is anessential component of the engine's oilsystem.
   弹簧扩张器油环是发动机油系统的一个必要组成部分。
2. 2. The springexpander oil ring helpsto maintain proper oil pressure andprevent leaks in the engine.
   弹簧扩张器油环有助于保持适当的油压，防止发动机泄漏。
3. 3. During maintenance, the technician carefully inspected the spring expander oilring for any signs of wear ordamage.
   在维护过程中，技术人员仔细检查了弹簧扩张器油环，以查看任何磨损或损坏的迹象。