bolt clasp

例句：

1. 1. The bolt clasps the door shut securely.
   这个扣件将门牢牢地扣上。
2. 2. He used a bolt clasp to secure his bag.
   他用一个扣件来固定他的包。
3. 3.The bolt clasp was designed to prevent the door from opening accidentally.
   这个扣件设计用来防止门意外打开。