me-chanical seal with flouting inter-mediute ring

例句：

1. 1. The mechanical seal in the pump isworking properly.
   泵中的机械密封工作正常。
2. 2.The engineer used a new type of mechanicalseal to improve efficiency.
   工程师使用了一种新型的机械密封来提高效率。
3. 3. Themanufacturer claims that their mechanicalseal has a longer lifespanthan other brands.
   制造商声称他们的机械密封比其他品牌有更长的使用寿命。