Our company manufactures a range of printing presses that are used successfully by companies in over 20 countries. A product specification brochure is enclosed. We are considering expanding our products to new markets and we would appreciate you assistance. In particular, we would like to identify the best agents who are currently serving the printing industry in your region. We are looking for organizations which conduct their business in a truly professional manner. They must be fully conversant (熟悉) with the technical side of the printing industry and have a comprehensive understanding of all the features of the lines they represent. We would be very grateful if you could take a few moments to send us the names of three or four organizations that match our requirements. We shall then contact them to explore the possibility of establishing a mutually acceptable business relationship. Thank you very much for your time and consideration in this matter.

How many countries are using the company’s products（）