In addition, the flat metal coating will not be scratched with the probe, so that the conducting plate has long service life and good experiment effect.
另外，金属镀膜平整度好，且不会被探针划伤，因此，导电板的使用寿命长，实验效果好。
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.
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。
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