on surface of plastic or metal parts"："金属／塑料表面有明显缩水或变形" grinding mark：磨痕 bulbs on holder poorly assembled：(灯座上）灯泡安装不良 ..
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The shift leader a day with bad board to first tested grinding mark.
当班组长每天要用不良板来先调试好磨痕。
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Water mark pattern is minor, waxing and polishing to cure severe grinding or painting.
水痕纹属细微时，打蜡抛光可治好；严峻时需研磨或喷漆。
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