crankcase bearing seat

例句：

1. 1.The engine's crankcase bearing seat is worn out, causing the engine to overheat.
   发动机的曲轴箱轴承座磨损，导致发动机过热。
2. 2. The technician replaced the worn-out crankcase bearing seat with a new one.
   技师用一个新的轴承座替换了磨损的曲轴箱轴承座。
3. 3. The engineer carefully inspected the crankcase bearing seat before starting the engine.
   工程师在启动发动机前仔细检查了曲轴箱轴承座。