astragal tool

例句：

1. 1.The astragal tool was used to measure the distance between two stars.
   星状突起工具被用来测量两颗恒星之间的距离。
2. 2.The astragal tool is a crucial component in the study of astrophysics.
   星状突起工具是天体物理学研究中至关重要的组成部分。
3. 3.The astragal tool has been used for centuries to study the movements of planets and stars.
   星状突起工具被使用了几个世纪来研究行星和恒星的运动。