crankcase bolt

例句：

1. 1. The car's engine was seized due to a faulty crankcase bolt.
   由于曲柄箱螺栓故障，汽车的发动机被卡住了。
2. 2.After the engine overheated, the mechanic had to replace the crankcase bolt.
   引擎过热后，技师不得不更换曲柄箱螺栓。
3. 3. The technician carefully removed the crankcase bolt and inspected the engine for signs of wear.
   技术员小心地卸下曲柄箱螺栓，检查引擎是否有磨损的迹象。