THE STRUCTURE OF THE MATHEMATICAL MODEL OF THE UPSTREAM OF A GAS SUSPENSION IN THE ASCENDING FLOW OF A GUSHING-FLUIDIZED BED - Mirzaev, Johnreed Akhatovich; Babakhodjayev, Rahimjan Pachekhanovich; Tashbaev, Nozim Tulaevich; Eshkuvatov, Lutfulla Muradullaevich (Innovatsion texnologiyalar, 2025)