English 
Today we are living in the concrete jungle, all the buildings are commonly made of steel. These buildings can serve a long time almost 100 years. Because of its versatility, nearly all the buildings around us are made of various types of steel. The expanded metal is the most common seen. The raised
Expanded metal is made of the whole metal sheet, after pressing the metal sheet it would be die cut and expanded. There are two types of the expanded metal mesh, the raised metal mesh and the flattened type. Each style can be made into two types, besides the difference of the appearence, the flatten