back cylinder head

例句：

1. 1.The car's engine is a complexmachine with many moving parts.
   这辆车的发动机是一个复杂的机器，有许多移动部件。
2. 2.The engineer carefully inspected the back cylinderhead before starting the engine.
   工程师在启动发动机前仔细检查了后置气缸头。
3. 3. The manufacturer replaced the back cylinder headafter the customer complained about its poorperformance.
   客户抱怨性能不佳后，制造商更换了后置气缸头。