roller bearing crank

例句：

1. 1. Theroller bearing crank is a crucial componentin the machine's operation.
   滚动轴承曲柄是机器运行中的关键部件。
2. 2. Theengineer carefully adjusted the roller bearing crankto ensure smooth operation.
   工程师仔细调整了滚动轴承曲柄，以确保机器平稳运行。
3. 3.The roller bearing crank was responsible fortransmitting power from the motor to thegears.
   滚动轴承曲柄负责将电机的动力传递给齿轮。