采用薄刀分切(厚度仅为1毫米)、设有自动、手动砂轮磨削，保持刀刃锋利，使分切的纸板平滑整齐。
Slit with thin blade (about 1 mm thickness), with function of automatic or manual grindstone to keep blade sharp and slit sheet smoothly and tidily.
孔子说：“做工的人想把活儿做好，必须首先使他的工具锋利。
The Master said, "The mechanic, who wishes to do his work well, must first sharpen his tools."
为了使凿刀和刨子好用且安全，必须保证他们的刃足够锋利。
Keeping a sharp edge on chisels and plane irons is absolutely necessary for the successful and safe use of these tools.
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