packing collar

例句：

1. 1. The packing collar on the suitcase is designed to keep it closed securely.
   手提箱上的包装扣设计用来确保它安全地关闭。
2. 2. The zipper on the jacket is too tight, so I had to unzip it.
   夹克上的拉链太紧了，所以我不得不把它拉开。
3. 3. The button on the shirt was loose, so I replaced it with a new one.
   衬衫上的纽扣松了，所以我用一个新的替换了它。