这种材料看起来非常有光泽镍，无划痕，非常光滑。
The material looks very shiny nickel, no scratches, very smooth.
外壳表面应平整无划痕、缩水纹、毛刺及其它机械损伤。
Surface of the adaptor case should no scratch , . no shrinkage mark, flash and mechnical damage.
为了得到最好的抗腐蚀性能，表面应无划痕和其他物质，加工完的零件需做钝化处理。
For optimum corrosion resistance, surfaces must be free of scale and foreign particles and finished parts should be passivated.
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