gold plating thickness
金属镀层厚度计 metal coating apparatus
插脚镀镍和镀金层厚度 Nickel & Gold Finger PlatingThickness
曾经有人去一家金属研究检测部门，做过手表壳的镀金厚度检测，他们用的那个设备有强烈的射线，实验刚结束，取出表壳再一看，坏了！
Many people go to a metal detection research department, tested the watch shell plating thickness, the equipment they use a strong radiation experiment was completed, remove the case again, bad!
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