square honing stone

例句：

1. 1.The square honing stone is used tosharpen tools.
   方形磨石用于磨利工具。
2. 2. The square honing stone isa common tool in the workshop.
   方形磨石是车间里常见的工具。
3. 3. The squarehoning stone is essential for maintaining thesharpness of tools.
   方形磨石对于保持工具的锋利度至关重要。