end sill plate

例句：

1. 1.The car's engine is made up of several components including an end cap and a piston.
   这辆车的发动机由多个部件组成，包括一个端盖和一个活塞。
2. 2. The engineer carefully assembled the end cap to ensure proper alignment.
   工程师仔细组装端盖，确保正确对齐。
3. 3.The technician replaced the worn out end cap with a new one.
   技术人员用一个新的端盖替换了磨损的端盖。