smokebox door hinge

例句：

1. 1. The smoker'sdoor hinge is the most importantpart of the lock.
   烟盒门铰链是锁中最关键部分。
2. 2. The smoker's door hinge is easyto replace if it breaks.
   如果烟盒门铰链坏了，很容易更换。
3. 3. The smoker's door hinge isdesigned to keep the door closed when notin use.
   烟盒门铰链设计成在不使用时保持门关闭。