pivot pin cap

例句：

1. 1.The engineer carefully removed the pivot pin cap to inspect the mechanism.
   工程师小心翼翼地取下枢轴销帽以检查机构。
2. 2. The technician replaced the pivot pin cap with a new one.
   技术员用一个新的枢轴销帽替换了它。
3. 3. The carpenter used a pivot pin cap to secure the joint.
   木匠使用一个枢轴销帽来固定接头。