Twist Drill bit an est un outil pour former des trous ronds de la pièce en rotation en ce qui concerne son axe fixe. Twist Drill Bit Auger est nommé pour sa forme de récepteur de puce en spirale ressemblant à une torsion. Les rainures en spirale de forage torsion de torsion ont 2, 3 rainures ou plus, mais 2 rainures sont les plus courantes.
2022/06/10
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