The cutting tool must be harder than the material to be cut.
切削刀具必须比要切削的材料硬。
The tool point angle (TPA) is formed by the two lips and is chosen based on the properties of the material to be cut.
两条钻唇形成钻顶角，并根据被钻削材料的性能来选取其大小。
The second blade is disposed to face the first blade so that a sheet-shaped material to be cut is placed between the first blade and the second blade.
第二把刀片被配置面对第一把刀片，以便将被切开的板料形状的材料被安置在第一把刀片和第二把刀片之间。
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