anchor swivel

例句：

1. 1. The ship's anchor was securely fastened to the dock.
   船的锚被牢固地系在码头上。
2. 2. The anchor swivel is designed to make it easy for divers to move around.
   锚旋转器的设计使得潜水员能够轻松移动。
3. 3. The anchor swivel is a crucial part of the ship's navigation system.
   锚旋转器是船舶导航系统的关键部分。