And a moist blade kept in the shower, harbouring old hair and dead skin, can lead to ingrown hairs and irritation when shaving because the blade becomes blunt.
并且放在浴室的潮湿刀片上藏匿着旧头发和死皮，使用剃刀的时候会导致毛发内生，引发刺激性反应，因为刀片变钝了。
The algorithm and formulas to determine the size of tip relief modification of pre shaving gear hobs are put forward. A principle to determine the lead width of tooth roots is also presented.
给出了剃前齿轮滚刀修缘尺寸的计算方法和计算公式，并对滚刀齿根的齿间槽宽提出了更为合理的判断原则。
The algorithm and formulas to determine the size of tip relief modification of pre shaving gear hobs are put forward. A principle to determine the lead width of tooth roots is also presented.
给出了剃前齿轮滚刀修缘尺寸的计算方法和计算公式，并对滚刀齿根的齿间槽宽提出了更为合理的判断原则。
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