When you browse a website, you would like to have a general ideal about what this company sell. This is the index function. That is to say, a WHEAT FLOUR MILLING MACHINE index is exactly important for a company' website.
When you see the wheat flour milling machine index, you will know all the products this company sell. It is almost like a book's catelog that gives you some information. Here comes the question, how do you find the index? Generally, every website has the sitemap, when you click this world, it will show you clearly.
www.wheat-flour-mill.org