What's the use of a sharpener?
Can be divided into the following categories: first, knife grinder grinder, such as paper cutter, meat cutting machine, cutting materials, rotary cutting machine, plastic crusher, dryer blade etc.. Two, drills, milling cutters. Three, household kitchen knife, fruit knife, sword and so on.
No matter which type of sharpener is, it is a function, that is, what is the function of the sharpener: it is to sharpen the tool's blade, sharpen the edge of the knife, and make the tool better and more efficient. As the saying goes, modaobuwukanchaigong. This is the reason, you only sharpen the knife, you can work, efficient, can improve the quality.