roll neck bearing

例句：

1. 1. The engineer designed a new type of roll neck bearing to improve the machine's efficiency.
   工程师设计了一种新型的滚动轴承，以提升机器的效率。
2. 2.The old car had a worn-out roll neck bearing that needed to be replaced.
   这辆旧车有一个磨损的滚动轴承需要更换。
3. 3.The technician carefully inspected the roll neck bearing before installing it in the machine.
   技术员在安装机器前仔细检查了滚动轴承。