mechanical seal with inside mounted spring

例句：

1. 1. The mechanical seal in the pump is working perfectly.
   泵上的机械密封工作得非常好。
2. 2.The engineer replaced the worn-out mechanical seal with a new one.
   工程师用一个新的机械密封替换了磨损的密封件。
3. 3. The manufacturer claims that their mechanical seals are more durable than those of competitors.
   制造商声称他们的机械密封比竞争对手的更耐用。