Development of yellow colour in pale colours when subjected to heat and/or light. When overcured for long periods or excessively high temperatures white powder coatings will darken or "yellow".

当涂层受热和/或光线照射下变化的趋势，长时间在较高的温度下，白色粉末涂料会变暗或发黄。

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This paper mainly research on the feasibility technique of high speed fan-type light wheel coal grinding machine in boiler powder manufacturing system which applied in power plant used brown coal.

本文主要研究应用在发电厂以褐煤为燃料的锅炉制粉系统中的高速风扇式轻型轮磨煤机可行性技术。

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The lamp tube after using the method for coating the powder has the advantages of high luminescence efficiency, small light wane and long service life.

用本发明方法涂粉后的灯管，发光效率高、光衰小、使用寿命长。

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