当前位置：Widetop > W1 > Widetop > Flute length of the twist drill bits Flute length of the twist drill bits 作者：WIDETOP • 2019-06-28 The distance from the outer edges of the cutting lips to the extreme back of the flutes 上一篇文章 : Flute of the twist drill bits 下一篇文章 : Nigh-speed steel, used for making twist drill bits