Automation control systems with polynomial dynamics description are considered in the paper. Characteristic equation coefficients of these systems are changeable in infinite intervals of actual values. A root portrait concept of an interval control system has been introduced. https://safeersappliancers.shop/product-category/neff-d95frm1s0b-n70-built-in-89cm-3-speeds-a-chimney-cooker-hood-black/