两种粉末不能混合，混合后会出现不同的表面，如光泽的降低或缩孔。
Inability to mix two powders without getting a different surface appearance, such as gloss reduction or craters.
就像局部污染物质或溶解不完全的球形物质，一般来说其表面张力都要低于缩孔受体的表面张力。
Just like local pollutants or dissolution of the conglobated material, generally speaking it is a lower surface tension crater receptor of surface tension.
对连轧机精轧支承辊大面积剥落的原因进行了深入的分析，结果表明，轧辊内部的缩孔、气泡及热处理不当是造成轧辊表面剥落的主要原因。
It has been analysed the causes for the heavy surface spalling of back-up roll for a finishing mill. The result shows that the main causes are gas hole, shrinkage and bad heat treatment.
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