graphite-seal ring

例句：

1. 1.The graphite-seal ring is used to prevent leaks in the oil pipeline.
   石墨密封环用于防止油管泄漏。
2. 2. The engineer used a graphite-seal ring to repair the damaged pipe.
   工程师使用石墨密封环来修复损坏的管道。
3. 3. The graphite-seal ring was designed to withstand high pressure and temperature.
   石墨密封环被设计用来承受高压和高温。