injection-valve closing pressure

例句：

1. 1. The injection valve is responsible for maintaining the correct pressure in the system.
   注射阀负责保持系统中正确的压力。
2. 2. During the operation, the injection valve must be closed to prevent leakage.
   在操作过程中，必须关闭注射阀以防止泄漏。
3. 3. The pressure of the injection valve should be checked regularly to ensure it is functioning properly.
   应定期检查注射阀的压力，以确保其正常工作。