ball plunger groove

例句：

1. 1.The ball plunger groove on the machine is designed to ensure smooth operation.
   机器上的球杆冲头槽设计用来确保操作顺畅。
2. 2. The ball plunger groove helps to reduce friction and improve efficiency.
   球杆冲头槽有助于减少摩擦并提高效率。
3. 3.The ball plunger groove is a critical component of the machine's mechanism.
   球杆冲头槽是机器机制的关键组成部分。