shifting rock arm bushing

例句：

1. 1. The rockarm bushing is designed to protect the drill bit from damage.
   这个岩石臂衬套的设计是为了保护钻头免受损坏。
2. 2.The rock arm bushing is crucial for maintaining the stability of the drilling operation.
   岩石臂衬套对于保持钻井作业的稳定性至关重要。
3. 3.The rock arm bushing is made of high-quality materials and can withstand extreme temperatures.
   这种岩石臂衬套是由高质量的材料制成的，能够承受极端的温度。