javad mashaikh in the studio. ok , you are very welcome. good morning. good morning to you too. good service to you, your colleagues and all dear and respected viewers. how many companies are present in the 11th edition of the exhibition? yes, we will have the honor of hosting more than 330 companies providing advanced laboratory materials and equipment in the 11th edition of the iran exhibition, which will present their achievements for 4 days from today until the 15th of december. international exhibition site. tehran will offer milad persian gulf and 40th hall. how many scientific companies that are active in this field came to participate in these 340? you see, we have about 9,500 companies of scientists operating in the country. about 300 and andy now nearly 400 companies in the field of equipment. laboratory essence and testing and testing materials are active. most of these companies, that is, more than 90% of them are actually present in the exhibition, so the exhibition space is provided for the presence of those companies that have the format of those companies that wa