crankshaft case

例句：

1. 1. The car's engine is located in the crankshaft case.
   汽车的引擎位于曲轴箱内。
2. 2.The mechanic had to disassemble the crankshaft case to replace the worn-out parts.
   机械师不得不拆解曲轴箱以更换磨损的部分。
3. 3. The crankshaft case is designed to protect the engine from external damage.
   曲轴箱的设计是为了保护发动机免受外部损害。