filter bag retainer

例句：

1. 1.The filter bag retainer is designed to keep the air clean during surgery.
   过滤器袋式保持器设计用来在手术期间保持空气清洁。
2. 2. The patient was fitted with a filter bag retainer to prevent infection.
   患者被安装了过滤器袋式保持器以防止感染。
3. 3.The filter bag retainer effectively reduced the amount of dust in the air.
   过滤器袋式保持器有效地减少了空气中的灰尘量。