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| 1. SPC (Statistic Production Control) |
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Strength test – die-cast raw products |
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Strength test – finished products |
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Dimension and conductivity |
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| 2. Color check -PVC tile |
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Naked eye and color meter |
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| 3. Ni-Cr plating |
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Thickness check - electrolytic metallic coating |
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Adhesive strength |