frost valve

例句：

1. 1.The frost valve is crucial for maintaining the integrity of the pipeline during cold weather.
   霜冻阀门在寒冷天气中对保持管道完整性至关重要。
2. 2. During the winter, the frost valve must be checked regularly to prevent any potential leaks.
   冬季，必须定期检查霜冻阀门以防止潜在的泄漏。
3. 3. The engineer carefully inspected the frost valve and found no signs of damage or wear.
   工程师仔细检查了霜冻阀门，发现没有任何损坏或磨损的迹象。