steam valve packing

例句：

1. 1. The steam valve is a critical component in the heating system.
   蒸汽阀是供暖系统中的关键部件。
2. 2. The steam valve was replaced due to its poor performance.
   由于性能不佳，蒸汽阀被更换了。
3. 3.The steam valve packing is essential for maintaining the integrity of the pipeline.
   蒸汽阀填料对于保持管道完整性至关重要。