circular saw sharpener

例句：

1. 1. We need to sharpen our circular saw blades before we start cutting the wood.
   我们在开始切割木材之前，需要磨利我们的圆锯刀片。
2. 2. The circular saw sharpener is a useful tool for professionals who work with heavy-duty materials.
   圆形锯磨刀器是专业人士在处理重型材料时的一个有用的工具。
3. 3. The sharpener was designed to make it easier for us to maintain the sharpness of our circular saw blades.
   磨刀器的设计是为了让我们更容易地保持圆锯刀片的锋利。