pan rivet head

例句：

1. 1.The carpenter used a pan rivet head to secure the wooden planks together.
   木匠用一个圆头铆钉头将木板固定在一起。
2. 2.The construction workers were working on a project that required a lot of pan rivet heads.
   建筑工人正在参与一个项目，这个项目需要大量的圆头铆钉。
3. 3.The engineer had to replace the pan rivet head on the bolt before it failed.
   工程师在螺栓失效之前不得不更换了圆头铆钉。