Copper and Machinery

As the current copper is not too much use, perhaps we can add some use of copper to make machinery, in order to enrich the copper play and role, which can make the MC has more play and more comprehensive mechanical process, and some of the characteristics of copper and the reality of the machinery is very similar to the texture, as well as its unique mechanical style, so that as an extension of the mechanical aspects of the very good, and I hope that the official can be adopted!