mainshaft pilot bearing

例句：

1. 1.The mainshaft pilot bearing is vital for the smooth operation of the engine.
   主轴导轴承对于发动机的平稳运行至关重要。
2. 2.The engineer carefully inspected the mainshaft pilot bearing before installing it.
   工程师在安装之前仔细检查了主轴导轴承。
3. 3. Mainshaft pilot bearings are prone to wear and tear, so they need to be replaced regularly.
   主轴导轴承容易磨损，因此需要定期更换。