Anodic oxidation: on the surface of aluminum, a layer of alumina would be produced through electrochemical principle. This oxide film has special properties.

On 29th May, The 10th China Flower Expo would be held in Chong Ming, Shanghai. There is an environmental friendly bench in this expo, which is quite eye-catching: It’s made of 5027000 pcs waste milk box: Breaking the milk box in pieces, and then produce by special technology in high pressure.The de