plunger follower spring

例句：

1. 1.The pump plunger is essential for maintaining proper water pressure in the system.
   泵柱塞对于保持系统内适当的水压至关重要。
2. 2. The pump plunger spring was replaced due to its failure after several years of use.
   由于使用几年后柱塞弹簧失效，所以更换了泵柱塞弹簧。
3. 3. The pump plunger spring needs to be regularly inspected and maintained to ensure its proper functioning.
   为了确保泵柱塞弹簧正常工作，需要定期检查和维护。