upper head plate

例句：

1. 1. The engineer designed the upper head plate to fit perfectly into the machine.
   工程师设计了上盖板，使其完美地安装在机器中。
2. 2. The upper head plate is where the screws are tightened to hold the parts together.
   上盖板是螺丝紧固的地方，用来固定部件。
3. 3. The upper head plate was removed to access the electrical connections inside the machine.
   为了检查机器内部的电气连接，需要拆卸上盖板。