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