bow shell door

例句：

1. 1. The bow shell door is the only way to open the door.
   门铰是打开门的唯一方式。
2. 2. The old house had a bow shell door that was worn out.
   那所旧房子有一个磨损的门铰。
3. 3. The new car has a modern bow shell door.
   这辆新车有一个现代的门铰。