Engineers from one of the companies of Vali-e-Asr University of Rafsanjan achieved technical knowledge of manufacturing the liners of the mineral industry, which was an imported product, and extended their shelf&useful life to one year. ‎

‎Amir Hossein ‎‎Sarafpour reseacher from the research and development team of the company described the company’s product as combined rubber and metal liners and stated: The main features of these liners are that the properties of all rubber and all the metal liners are combined together in this production.‎

‎He added: These combined liners are similar in terms of anti-wear properties and similar to rubber liners in terms of weight and ease of installation.