pump bearing

例句：

1. 1. The pump bearings are worn out and need to be replaced.
   泵轴承磨损了，需要更换。
2. 2. He carefully inspected the pump bearings before starting the machine.
   他在启动机器前仔细检查了泵轴承。
3. 3. The engineer replaced the pump bearings with new ones to ensure proper functioning.
   工程师用新的泵轴承替换了旧的，以确保正常工作。