grooved disc

例句：

1. 1. The grooving process is crucial for the quality of the final product.
   磨光过程对于最终产品的质量至关重要。
2. 2.The grooved discs are used in various applications such as music and recording.
   凹面圆盘被用于音乐和录音的多种应用中。
3. 3. The grooved disc technology has advanced significantly over the years.
   多年来，凹面圆盘技术已经取得了显著的进步。