reverse key head bolt

例句：

1. 1. The car's engine was reversed and the key head bolt was removed to start it.
   汽车发动机被反转，然后取下了钥匙头螺栓来启动它。
2. 2. The mechanic used a special tool to reverse the key head bolt and remove the jammed gear.
   机械师使用一种特殊的工具来反转钥匙头螺栓并取出卡住的齿轮。
3. 3. The engineer had to reverse the key head bolt to access the damaged part of the machine.
   工程师不得不反转钥匙头螺栓才能进入机器受损的部分。