本文对发黑物的化学成分、发黑原因、对电机的影响及防止发黑的方法作了一些探讨。
In this article, we make a general study of chemical component of the black substance, the reason of turning black, its effect on the motor and way to prevent the phenomenon.
嘴唇颜色比较暗，发黑的原因？
比较了几种保护剂，分析了薄膜绕包线导体出现发黑现象的原因，提出了有效的解决方法，验证了产品的性能。
The results show that the protective reagent solution won't influence the mechanical and electrical properties of film lapped wires.
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