In this article, based on the results of theoretical and practical studies, local resistances are determined in the zones of narrowing of pneumatic transport air ducts, and the change in air speed is presented in graphical form....

Currently, a lot of work is being done to improve the quality of low-grade cotton, which is difficult to clean manually and by machine, to improve product quality, reduce costs and provide the population with high-quality and affordable products. Analyzed the scientific work carried out by...