What are features of professional Raymond mill manufacturer?

When choosing a Raymond mill, one would find the best Raymond mill manufacturer for a high quality and warranty machine. But when import a machine from other countries, What are features of professional Raymond mill manufacturer? how to distinguish and select one in so many manufacturers?

If you browse on website, every manufacturer says his is best. And it is unbelievable. When choosing, pass the trading company first. This trading company is just a middleman, they buys machine first and sale to you. Then among the manufacturers, the key is examining the quality and warranty, the suitable not the top. If you are convenient, just go to their factory for a look. If not, let them give you persuasive data, such as exporting date and case.