unbalanced mechanical seal

例句：

1. 1.The unbalanced mechanical seal caused the pump to fail.
   这个不平衡的机械密封导致泵失效了。
2. 2.The engineers were trying to fix the unbalanced mechanical seal on the machine.
   工程师们正在试图修复机器上的不平衡机械密封。
3. 3. The new design of the mechanical seal is supposed to improve the balance and reduce noise.
   新型机械密封的设计旨在提高平衡并减少噪音。