return flow prevention valve

例句：

1. 1.The return flow prevention valve is essential for maintaining the integrity of the pipeline system.
   回流防止阀对于保持管道系统的完整性至关重要。
2. 2.The engineers installed a return flow prevention valve to prevent any potential leaks in the system.
   工程师们安装了回流防止阀，以防止系统潜在的泄漏。
3. 3. During maintenance, the technician replaced the old return flow prevention valve with a new one.
   在维护期间，技术人员用一个新的回流防止阀替换了旧的。