face-to-face duplex bearing

例句：

1. 1.The new elevator has a face-to-face duplex bearing system that provides smoother and quieter operation.
   新电梯采用了面对面的双联轴承系统，运行更加平滑和安静。
2. 2. The construction machine used in the project is equipped with face-to-face duplex bearings, ensuring stable operation.
   该项目使用的施工机械配备了面对面的双联轴承，确保了稳定运行。
3. 3. The design of the gearbox features face-to-face duplex bearings, which greatly improves the transmissionefficiency.
   齿轮箱的设计采用了面对面的双联轴承，大大提高了传动效率。