bellows mechanical seal

例句：

1. 1.The bellows mechanical seal is a crucial component in the manufacturing process.
   风箱机械密封是生产过程中的关键部件。
2. 2. The bellows mechanical seal is used to prevent air leakage during the operation of the machinery.
   风箱机械密封用于防止机器运行过程中的气体泄漏。
3. 3. The bellows mechanical seal has been proven to be more efficient and reliable than traditional sealing methods.
   风箱机械密封已被证明比传统的密封方法更高效、更可靠。