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在百货店里,我们随时都可以看到一些美丽的金黄色或其他颜色的香烟盒、肥皂盒等铝制日用品。铝制日用品的鲜艳颜色是怎样涂上去的呢?
In the department store, we can see some beautiful gold or other colors of cigarette boxes, soap boxes and other aluminum daily necessities at any time. How is the vivid color of aluminum daily necessities painted?