When looking at the precise panel saw, you would notice that there are two saw blades, including main saw blade and line saw blade. When taking cutting and sawing works, the line saw blade will begin to work at first and there would be groove at cut material bottom, about 1 to 2 mm. By this way, when cutting with the main saw blade, there would be no tear at the edge of saw bite so as to get top quality cutting and sawing effect.
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