burr edge

例句：

1. 1.The burr edge of the saw is sharp enough to cut through wood.
   锯的齿边足够锋利，能切木头。
2. 2.The car's bumper has a burr edge that helps protect the driver's face.
   汽车的保险杠有齿边，有助于保护驾驶员的脸。
3. 3.The chef used a burr edge to shave off the crust from the pie.
   厨师用齿边刮掉了馅饼上的皮。