apex seal

例句：

1. 1. The apex seal on the door is broken, and we need to replace it immediately.
   门上的顶点密封件坏了，我们需要立即更换。
2. 2.The engineer used a special apex seal to prevent water from seeping into the building.
   工程师使用一种特殊的顶点密封来防止水渗入建筑物。
3. 3. The apex seal was designed to ensure that the airtightness of the room remained constant.
   这个顶点密封设计用来确保房间的密封性保持不变。