要把针头的利角及磨纹磨走，我们会利用滚筒型的砂轮把针头磨成尖、圆、平或子弹形形状。

To get rid of the sharp Angle and the grinding tracks on the probe, the tip will be polished by roll-typed grinding wheels to become sharp, round, flat or ball pointed.

youdao

要把针头的利角及磨纹磨走，我们会利用滚筒型的砂轮把针头磨成尖、圆、平或子弹形形状。

To get rid of the sharp Angle and the grinding tracks on the probe, the tip will be polished by roll-typed grinding wheels to become sharp, round, flat or ball pointed.

youdao